Discovery of Cell Structure

He observed that the cork resembled the structure of a honeycomb consisting of many little compartments.

He called them cells.

It is a Latin word for 'a little room'.

<p>It prevents the peel from getting folded or getting dry.</p> Signup and view all the answers

<p>To place a drop of water and transfer a small piece of the peel from the watch-glass to the slide.</p> Signup and view all the answers

<p>Epidermis.</p> Signup and view all the answers

<p>A pair of forceps.</p> Signup and view all the answers

<p>To get a clear view of the onion peel under a microscope.</p> Signup and view all the answers

<p>It was the first time that someone observed that living things appear to consist of separate units.</p> Signup and view all the answers

<p>To observe the structure of the onion peel.</p> Signup and view all the answers

<p>It helps to remove the skin gently and carefully.</p> Signup and view all the answers

<p>It would get folded or dry out.</p> Signup and view all the answers

<p>To observe it under a microscope.</p> Signup and view all the answers

<p>A honeycomb consisting of many little compartments.</p> Signup and view all the answers

<p>It is used to peel off the skin (epidermis) of the onion.</p> Signup and view all the answers

<p>To understand the structure of living organisms.</p> Signup and view all the answers

<p>To prevent the onion peel from getting folded or dry.</p> Signup and view all the answers

<p>To ensure a clear observation under the microscope.</p> Signup and view all the answers

<p>To observe the cellular structure of the onion peel.</p> Signup and view all the answers

<p>To carefully peel off the skin of the onion.</p> Signup and view all the answers

<p>To prepare it for observation under the microscope.</p> Signup and view all the answers

<p>To observe the cellular structure that is not visible to the naked eye.</p> Signup and view all the answers

<p>To understand the biology of living organisms.</p> Signup and view all the answers

<p>To hold the onion peel in place for observation.</p> Signup and view all the answers

<p>It can be inferred that the cork is composed of many small, compartmentalized units.</p> Signup and view all the answers

<p>It prevents the onion peel from getting folded or dry.</p> Signup and view all the answers

<p>It allows for the observation of cells at a magnified level, revealing their structure and organization.</p> Signup and view all the answers

<p>It provides a flat surface for mounting the onion peel, allowing for observation under the microscope.</p> Signup and view all the answers

<p>The Latin word 'cell' means 'a little room', which is analogous to the compartmentalized structure of cells.</p> Signup and view all the answers

<p>It is to obtain a sample of the inner layer of the onion, which can be observed under a microscope.</p> Signup and view all the answers

<p>It marked the first time that someone had observed that living things appear to consist of separate units.</p> Signup and view all the answers

<p>The onion peel is composed of many cells, which are organized in a specific structure.</p> Signup and view all the answers

<p>The honeycomb-like structure of cork, consisting of many little compartments, led Robert Hooke to coin the term 'cell'.</p> Signup and view all the answers

<p>It emphasizes the fundamental concept that living organisms are composed of individual units, which are the building blocks of life.</p> Signup and view all the answers

<p>To prevent the peel from getting folded or dried, and to keep it flat and intact for observation.</p> Signup and view all the answers

<p>The term 'cell' is used to describe the basic structural and functional units of living organisms, which originated from Robert Hooke's observation of the cork's structure in 1665.</p> Signup and view all the answers

<p>To carefully and delicately remove the skin from the onion, ensuring that the underlying structure is not damaged.</p> Signup and view all the answers

<p>To ensure that the onion peel adheres to the slide and lies flat, facilitating observation under the microscope.</p> Signup and view all the answers

<p>The Latin word 'cell' is derived from the concept of a 'little room', which describes the individual compartments or units that compose living organisms.</p> Signup and view all the answers

<p>Observing the onion peel under a microscope reveals the individual cells that make up the tissue, providing insight into the structure and organization of cells.</p> Signup and view all the answers

<p>It made possible to observe and understand the complex structure of the cell and its various organelles.</p> Signup and view all the answers

<p>A single cell constitutes a whole organism.</p> Signup and view all the answers

<p>Cells divide to produce cells of their own kind.</p> Signup and view all the answers

<p>Unicellular organisms consist of a single cell, while multicellular organisms are composed of many cells that assume different functions.</p> Signup and view all the answers

<p>Cells from different parts of a plant body can exhibit differences in terms of shape, size, and structure.</p> Signup and view all the answers

<p>It reveals that living organisms are composed of cells, the basic units of life.</p> Signup and view all the answers

<p>Studying cells helps us understand the structure, function, and behavior of living organisms.</p> Signup and view all the answers

<p>Every multicellular organism has originated from a single cell.</p> Signup and view all the answers

<p>It reveals the diversity of cellular structure and function in different organisms.</p> Signup and view all the answers

<p>Onion bulbs of different sizes have similar small structures, which are the basic building units of the onion bulb, and these structures are cells.</p> Signup and view all the answers

<p>The cells of an onion peel are the basic building units of the onion bulb, and all organisms, including onions, are made up of cells.</p> Signup and view all the answers

<p>Robert Hooke's discovery of cells in 1665 marked the first observation of cells, which laid the foundation for the cell theory.</p> Signup and view all the answers

<p>Cells are the basic units of life, and all living organisms are composed of cells.</p> Signup and view all the answers

<p>Schleiden and Schwann presented the cell theory, which states that all organisms are composed of cells, and Virchow expanded it by suggesting that all cells arise from pre-existing cells.</p> Signup and view all the answers

<p>The discovery of the nucleus by Robert Brown in 1831 highlighted the importance of this organelle in the cell.</p> Signup and view all the answers

<p>Both onion peels and cork slices exhibit similar structures, which are the basic building units of these organisms and are composed of cells.</p> Signup and view all the answers

<p>The term 'protoplasm' was coined by Purkinje in 1839 to describe the fluid substance of the cell.</p> Signup and view all the answers

<p>Understanding the structure and function of cells is crucial for understanding the organization and function of living organisms.</p> Signup and view all the answers

<p>The complex structure of the cell and its various organelles.</p> Signup and view all the answers

<p>A single cell constituting a whole organism.</p> Signup and view all the answers

<p>Cells divide to produce cells of their own kind.</p> Signup and view all the answers

<p>The number of cells in an organism, with unicellular organisms having one cell and multicellular organisms having many cells.</p> Signup and view all the answers

<p>The basic building units of the onion bulb are cells, and they are composed of protoplasm and a nucleus.</p> Signup and view all the answers

<p>Differences in shape, size, and structure among cells.</p> Signup and view all the answers

<p>It allows for the growth and development of organisms.</p> Signup and view all the answers

<p>The cell theory states that all plants and animals are composed of cells, and that cells are the basic unit of life.</p> Signup and view all the answers

<p>They have differences in shape, size, and structure.</p> Signup and view all the answers

<p>The nucleus is a crucial part of a cell where genetic information is stored.</p> Signup and view all the answers

<p>Unicellular organisms are composed of a single cell, while multicellular organisms are composed of many cells.</p> Signup and view all the answers

<p>They originated from a single cell.</p> Signup and view all the answers

<p>Differences in shape, size, and structure among cells.</p> Signup and view all the answers

<p>Leeuwenhoek (1674) discovered the free-living cells in pond water for the first time.</p> Signup and view all the answers

<p>A microscope allows us to observe cells and their structures in detail, which helps us understand their function and importance.</p> Signup and view all the answers

<p>Understanding cells is crucial in understanding the structure and function of living organisms, and how they respond to their environment.</p> Signup and view all the answers

<p>Purkinje in 1839 coined the term 'protoplasm' for the fluid substance of the cell.</p> Signup and view all the answers

<p>Robert Hooke observed cells that resembled a honeycomb in a thin slice of cork.</p> Signup and view all the answers

<p>Virchow's contribution was that all cells arise from pre-existing cells, which helped complete the cell theory.</p> Signup and view all the answers

<p>The cells of the onion peel all look the same, regardless of the size of the onion.</p> Signup and view all the answers

<p>Cells</p> Signup and view all the answers

<p>Robert Hooke</p> Signup and view all the answers

<p>The discovery of the nucleus revealed the internal structure of cells.</p> Signup and view all the answers

<p>Protoplasm</p> Signup and view all the answers

<p>Virchow</p> Signup and view all the answers

<p>They have similar structures.</p> Signup and view all the answers

<p>It is made up of cells.</p> Signup and view all the answers

<p>It revealed the existence of single cells that live on their own.</p> Signup and view all the answers

<p>A single cell constitutes a whole organism.</p> Signup and view all the answers

<p>To produce cells of their own kind and assume different functions.</p> Signup and view all the answers

<p>Differences in shape, size, and structure among cells.</p> Signup and view all the answers

<p>It allowed us to observe and understand the complex structure of cells and their organelles.</p> Signup and view all the answers

<p>Cells are the basic units of life.</p> Signup and view all the answers

<p>No, cells in multicellular organisms assume different functions.</p> Signup and view all the answers

<p>Cells from different parts of a plant body may have differences in shape, size, and structure.</p> Signup and view all the answers

<p>Cells come from pre-existing cells through cell division.</p> Signup and view all the answers

<p>To understand the structure, function, and diversity of life.</p> Signup and view all the answers

<p>The shape and size of cells are related to the specific function they perform.</p> Signup and view all the answers

<p>All living cells have the capacity to perform certain basic functions that are characteristic of all living forms.</p> Signup and view all the answers

<p>Different parts of the human body perform different functions.</p> Signup and view all the answers

<p>Cell organelles.</p> Signup and view all the answers

<p>Due to the presence of cell organelles.</p> Signup and view all the answers

<p>They perform special functions necessary for the cell's survival.</p> Signup and view all the answers

<p>A cell.</p> Signup and view all the answers

<p>The same organelles.</p> Signup and view all the answers

<p>They enable division of labour within the cell.</p> Signup and view all the answers

<p>Plasma membrane, nucleus, and cytoplasm</p> Signup and view all the answers

<p>Plasma membrane or cell membrane</p> Signup and view all the answers

<p>Diffusion</p> Signup and view all the answers

<p>They move out of the cell through diffusion</p> Signup and view all the answers

<p>It is selectively permeable</p> Signup and view all the answers

<p>It separates the cell's contents from the external environment</p> Signup and view all the answers

<p>Diffusion occurs</p> Signup and view all the answers

<p>It is the outermost covering of the cell</p> Signup and view all the answers

<p>Plasma membrane, nucleus, and cytoplasm</p> Signup and view all the answers

<p>The diversity in shape and size of cells is related to the specific function they perform.</p> Signup and view all the answers

<p>Cell organelles perform special functions, such as making new material, clearing waste, and more, to enable the cell to live and perform its functions.</p> Signup and view all the answers

<p>The concept of division of labor means that different parts of an organism perform different functions, allowing for greater efficiency and specialization.</p> Signup and view all the answers

<p>The living cell is the basic unit of life that performs all the functions characteristic of living forms.</p> Signup and view all the answers

<p>The presence of cell organelles enables a cell to live and perform its functions.</p> Signup and view all the answers

<p>Cells are able to perform certain basic functions because they have specific components, such as cell organelles, that enable them to do so.</p> Signup and view all the answers

<p>The similarity in organelles found in all cells shows that all cells, regardless of their function or organism, share a common underlying structure.</p> Signup and view all the answers

<p>Cells perform their functions in a multicellular organism through a division of labor, where different cells and cell organelles work together to achieve specific functions.</p> Signup and view all the answers

<p>Cell organelles are essential for the survival and function of a cell, as they allow the cell to perform specific functions necessary for its survival.</p> Signup and view all the answers

<p>To allow or permit the entry and exit of some materials in and out of the cell, while preventing the movement of others.</p> Signup and view all the answers

<p>Diffusion.</p> Signup and view all the answers

<p>They move out of the cell through diffusion, as the concentration of the substance is lower in the external environment.</p> Signup and view all the answers

<p>Plasma membrane, nucleus, and cytoplasm.</p> Signup and view all the answers

<p>Because it allows or permits the entry and exit of some materials in and out of the cell, while preventing the movement of others.</p> Signup and view all the answers

<p>Not specified in the given text, but typically, the nucleus contains the cell's genetic material and controls cellular activities.</p> Signup and view all the answers

<p>Substances can move out of the cell through diffusion, as the concentration of the substance is lower in the external environment.</p> Signup and view all the answers

<p>The plasma membrane separates the contents of the cell from its external environment and regulates the movement of substances into and out of the cell.</p> Signup and view all the answers

<p>A substance will move out of the cell if its concentration is higher inside the cell than in the external environment.</p> Signup and view all the answers

<p>The main function of the plasma membrane is to control the movement of substances in and out of the cell, allowing the entry and exit of some materials while preventing the movement of others.</p> Signup and view all the answers

<p>When the concentration of a substance is high inside the cell and low outside, it moves out of the cell through the process of diffusion.</p> Signup and view all the answers

<p>These three features are essential for cell activities and interactions with the environment, enabling the cell to perform its functions.</p> Signup and view all the answers

<p>Diffusion allows for the spontaneous movement of substances from an area of high concentration to an area of low concentration, maintaining cellular balance.</p> Signup and view all the answers

<p>The cell membrane is selectively permeable, allowing certain substances to pass through while preventing others from entering or leaving the cell.</p> Signup and view all the answers

<p>The plasma membrane separates the cell from its external environment, controlling the exchange of materials between the two.</p> Signup and view all the answers

<p>The cell's interactions with its environment enable it to respond to changes, adapt to its surroundings, and maintain homeostasis.</p> Signup and view all the answers

<p>The movement of substances affects cellular processes, such as metabolism, growth, and maintenance, by providing necessary materials and removing waste products.</p> Signup and view all the answers

<p>The cell's ability to regulate substance movement is crucial for maintaining homeostasis, responding to changes in the environment, and ensuring proper cellular function.</p> Signup and view all the answers

<p>Cells perform their basic functions through the division of labour, where each cell organelle performs a special function, such as making new material or clearing up waste. This process is crucial for the cell's overall functioning, as it enables the cell to live and perform all its functions.</p> Signup and view all the answers

<p>The shape and size of cells are related to the specific function they perform. Some cells, like Amoeba, have changing shapes to adapt to their environment, while others, like nerve cells, have a fixed and peculiar shape for their specific function.</p> Signup and view all the answers

<p>The concept of division of labour refers to the distribution of tasks among different parts or components to achieve greater efficiency. In multicellular organisms, different parts of the body perform different functions, and in single cells, different cell organelles perform specific functions.</p> Signup and view all the answers

<p>Cell organelles are specific components within a cell that perform special functions, such as making new material, clearing up waste, and so on. They are essential for the cell's functioning and survival.</p> Signup and view all the answers

<p>The cell is considered the structural and functional unit of life because it is the basic unit of life, and all living organisms are composed of cells. This implies that cells are the fundamental units of life, and their structure and function are essential for the existence of life.</p> Signup and view all the answers

<p>Cells achieve their basic functions through the coordinated effort of cell organelles, which work together to perform specific functions. Cell organelles are responsible for making new material, clearing up waste, and so on, enabling the cell to function properly.</p> Signup and view all the answers

<p>The structure and function of cells are closely related, as the cell's structure determines its function, and vice versa. The functioning of cells impacts the overall functioning of the organism, as cells are the basic units of life.</p> Signup and view all the answers

<p>The fact that all cells have the same organelles, regardless of their function or organism, implies that all cells share a common ancestry and are connected through a shared evolutionary history. This highlights the unity and diversity of life at the cellular level.</p> Signup and view all the answers

<p>The components of a cell, such as cell organelles, work together to achieve the cell's overall functioning through a coordinated effort, where each organelle performs a specific function. This process is significant because it enables the cell to survive, grow, and respond to its environment.</p> Signup and view all the answers

<p>The presence of specific cell organelles that perform special functions.</p> Signup and view all the answers

<p>Both involve the separation of tasks into specialized components, with cell organelles performing specific functions in a cell and different organs performing specific functions in a multicellular organism.</p> Signup and view all the answers

<p>It is because these organelles are necessary for the basic functions of life, which are common to all living cells.</p> Signup and view all the answers

<p>The shape and size of cells are related to their specific function, with some cells having changing shapes and others having fixed and peculiar shapes.</p> Signup and view all the answers

<p>The cell organelles work together to perform their specific functions, enabling the cell to perform its basic functions and maintain its overall functioning.</p> Signup and view all the answers

<p>The cell is the basic unit of life because it is the smallest unit of life that can perform all the basic functions characteristic of living forms.</p> Signup and view all the answers

<p>The internal organization of a cell, with its cell organelles, enables the cell to perform its basic functions, such as making new material, clearing up waste, and so on.</p> Signup and view all the answers

<p>The structure of a cell, including its cell organelles, is related to its function, with specific organelles performing specific functions.</p> Signup and view all the answers

<p>The division of labor within a cell enables the cell to perform its basic functions efficiently and effectively, as each organelle performs a specific function.</p> Signup and view all the answers

<p>The plasma membrane is selectively permeable, allowing certain substances to enter or exit the cell while preventing the movement of others.</p> Signup and view all the answers

<p>The movement of substances occurs from a region of high concentration to a region of low concentration, allowing the cell to maintain homeostasis.</p> Signup and view all the answers

<p>The cell's external environment has a lower concentration of substances like CO2 compared to the cell's internal environment, facilitating the movement of substances out of the cell.</p> Signup and view all the answers

<p>The plasma membrane allows the cell to interact with its environment by regulating the movement of substances in and out of the cell.</p> Signup and view all the answers

<p>The plasma membrane's structure allows it to control the movement of substances across the cell boundary, permitting certain substances to enter or exit the cell while restricting others.</p> Signup and view all the answers

<p>The cell's ability to regulate the movement of substances is essential for maintaining its internal environment, removing waste products, and performing cellular functions.</p> Signup and view all the answers

<p>Diffusion allows the cell to maintain homeostasis by regulating the movement of substances and maintaining a stable internal environment.</p> Signup and view all the answers

<p>The nucleus plays a crucial role in controlling the cell's interactions with its environment by regulating gene expression and cellular responses.</p> Signup and view all the answers

<p>The cell's internal environment influences its ability to interact with its external environment by regulating the movement of substances and maintaining cellular functions.</p> Signup and view all the answers

<p>The shape and size of a cell is related to its specific function.</p> Signup and view all the answers

<p>The cell is the basic unit of life, as it is the smallest unit that can perform all the basic functions of life.</p> Signup and view all the answers

<p>Cells perform their basic functions through the division of labour within the cell, which is made possible by the presence of cell organelles.</p> Signup and view all the answers

<p>Cell organelles perform special functions such as making new material, clearing up waste material, and so on, which enables the cell to live and perform its functions.</p> Signup and view all the answers

<p>The division of labour within a cell is similar to the division of labour in multicellular organisms, where different parts of the organism perform different functions.</p> Signup and view all the answers

<p>This discovery highlights the unity and diversity of life, and suggests that all living organisms share a common ancestry.</p> Signup and view all the answers

<p>The structures and functions of cell organelles enable the cell to perform its basic functions by allowing it to make new material, clear up waste material, and so on.</p> Signup and view all the answers

<p>The cell being the basic unit of life means that all living organisms are composed of cells, and that cells are the fundamental units of life.</p> Signup and view all the answers

<p>The presence of cell organelles enables the cell to maintain homeostasis and regulate its internal environment by performing functions such as making new material and clearing up waste material.</p> Signup and view all the answers

<p>.Allow or permit the entry and exit of some materials in and out of the cell</p> Signup and view all the answers

<p>Higher inside the cell, lower outside</p> Signup and view all the answers

<p>Diffusion</p> Signup and view all the answers

<p>Plasma membrane or cell membrane</p> Signup and view all the answers

<p>Diffusion</p> Signup and view all the answers

<p>Plasma membrane, nucleus, and cytoplasm</p> Signup and view all the answers

<p>Through a process called diffusion</p> Signup and view all the answers

<p>It allows or prevents the entry and exit of certain materials</p> Signup and view all the answers

<p>Substances move out of the cell</p> Signup and view all the answers

<p>The cell shrinks because water passes out of the cell into the salt solution.</p> Signup and view all the answers

<p>The egg swells because water passes into it by osmosis.</p> Signup and view all the answers

<p>They lose water and shrink.</p> Signup and view all the answers

<p>Because they are in a hypotonic solution, where the concentration of solutes is lower than within the cell.</p> Signup and view all the answers

<p>It is important in the exchange of gases and water in the life of a cell.</p> Signup and view all the answers

<p>The shell, which is mostly calcium carbonate, is dissolved.</p> Signup and view all the answers

<p>A special case of diffusion through a selectively permeable membrane.</p> Signup and view all the answers

<p>It is important in the exchange of gases and water in the life of a cell.</p> Signup and view all the answers

<p>They gain water and swell.</p> Signup and view all the answers

<p>The cell will gain water by osmosis and swell up.</p> Signup and view all the answers

<p>An isotonic solution is a solution that has exactly the same water concentration as the cell. When the cell is placed in it, there is no net movement of water across the cell membrane, and the cell stays the same size.</p> Signup and view all the answers

<p>A hypertonic solution is a solution that has a lower concentration of water than the cell. When the cell is placed in it, the cell will lose water by osmosis.</p> Signup and view all the answers

<p>Osmosis.</p> Signup and view all the answers

<p>The concentration of water in the solution compared to the cell.</p> Signup and view all the answers

<p>The cell will swell up due to the influx of water.</p> Signup and view all the answers

<p>To maintain the balance of water and solute concentrations within the cell.</p> Signup and view all the answers

<p>Osmosis.</p> Signup and view all the answers

<p>The cell will gain water by osmosis and swell up.</p> Signup and view all the answers

<p>An isotonic solution.</p> Signup and view all the answers

<p>The cell will lose water by osmosis.</p> Signup and view all the answers

<p>The net diffusion of water across a selectively permeable membrane toward a higher solute concentration.</p> Signup and view all the answers

<p>The cell will gain water and swell up.</p> Signup and view all the answers

<p>The cell will lose water.</p> Signup and view all the answers

<p>There will be no net movement of water.</p> Signup and view all the answers

<p>The concentration of water in the surrounding solution compared to the cell.</p> Signup and view all the answers

<p>The cell will shrink.</p> Signup and view all the answers

<p>A selectively permeable membrane.</p> Signup and view all the answers

<p>The egg swells because water passes into it by osmosis.</p> Signup and view all the answers

<p>Water passes out of the egg solution into the salt solution because the salt solution is more concentrated.</p> Signup and view all the answers

<p>They gain water and swell.</p> Signup and view all the answers

<p>They lose water and shrink.</p> Signup and view all the answers

<p>Unicellular freshwater organisms and most plant cells.</p> Signup and view all the answers

<p>It is important for the exchange of gases and water in the life of a cell.</p> Signup and view all the answers

<p>Because water moves from an area of high concentration to an area of low concentration.</p> Signup and view all the answers

<p>The cell will gain water by osmosis and swell up.</p> Signup and view all the answers

<p>Isotonic solution</p> Signup and view all the answers

<p>The cell will lose water by osmosis.</p> Signup and view all the answers

<p>The concentration of solutes in the solution</p> Signup and view all the answers

<p>The cell will lose water by osmosis.</p> Signup and view all the answers

<p>The plasma membrane is selectively permeable, allowing water to move across the cell membrane in both directions.</p> Signup and view all the answers

<p>Osmosis helps maintain the proper balance of water and solutes within the cell.</p> Signup and view all the answers

<p>There is no net movement of water across the cell membrane.</p> Signup and view all the answers

<p>The cell shrinks as water passes out of the cell into the surrounding solution.</p> Signup and view all the answers

<p>To demonstrate the concept of osmosis and its effect on cells.</p> Signup and view all the answers

<p>Because they are in a hypotonic environment, where the concentration of solutes is lower than that of the cell.</p> Signup and view all the answers

<p>It is important for the exchange of gases and water between the cell and its environment.</p> Signup and view all the answers

<p>The cell remains the same size, as there is no net movement of water into or out of the cell.</p> Signup and view all the answers

<p>Because water passes out of the raisins or apricots into the surrounding solution through osmosis.</p> Signup and view all the answers

<p>Osmosis helps in the absorption of water by plant roots.</p> Signup and view all the answers

<p>The egg swells as water passes into the egg through osmosis.</p> Signup and view all the answers

<p>It allows certain substances to pass through while restricting others, regulating the exchange of substances between the cell and its environment.</p> Signup and view all the answers

<p>A hypotonic solution, which causes the cell to gain water by osmosis and swell up.</p> Signup and view all the answers

<p>It allows water to move across the membrane in both directions, but regulates the movement of solutes, enabling the cell to maintain proper osmotic balance.</p> Signup and view all the answers

<p>If the surrounding solution has a higher water concentration, water moves into the cell; if it has a lower concentration, water moves out of the cell.</p> Signup and view all the answers

<p>The cell remains the same size, indicating that the concentration of water inside the cell is equal to that of the surrounding solution.</p> Signup and view all the answers

<p>The cell loses water by osmosis, and the solution is described as a hypertonic solution.</p> Signup and view all the answers

<p>Osmosis helps maintain proper osmotic balance, enabling the cell to perform its functions and maintain its structure and shape.</p> Signup and view all the answers

<p>It enables the cell to maintain proper osmotic balance, regulate its shape and size, and perform its functions.</p> Signup and view all the answers

<p>The concentration of solutes affects the movement of water across the cell membrane, and this process is described as osmosis.</p> Signup and view all the answers

<p>Water passes out of the cell by osmosis and the cell shrinks.</p> Signup and view all the answers

<p>It allows certain substances to pass through while restricting others.</p> Signup and view all the answers

<p>It helps to regulate the concentration of water and ions within the cell, which is essential for cellular processes such as metabolism and respiration.</p> Signup and view all the answers

<p>Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration, while osmosis is the movement of water molecules through a selectively permeable membrane.</p> Signup and view all the answers

<p>There would be no net movement of water into or out of the cell, and the cell would remain the same size.</p> Signup and view all the answers

<p>It can cause cells to swell or shrink depending on the concentration of water in the external environment.</p> Signup and view all the answers

<p>It demonstrates the movement of water into and out of a cell through a selectively permeable membrane, illustrating the concept of osmosis.</p> Signup and view all the answers

<p>It determines the direction of water movement, with water moving from an area of high concentration to an area of low concentration.</p> Signup and view all the answers

<p>Osmosis is a specific type of diffusion that involves the movement of water molecules from an area of high concentration to an area of low concentration.</p> Signup and view all the answers

<p>A hypotonic solution, where the surrounding medium has a higher water concentration than the cell.</p> Signup and view all the answers

<p>The concentration of solutes in the surrounding solution compared to the cell.</p> Signup and view all the answers

<p>The cell will swell in a hypotonic solution, remain the same size in an isotonic solution, or shrink in a hypertonic solution.</p> Signup and view all the answers

<p>Osmosis.</p> Signup and view all the answers

<p>It allows for the regulated movement of water across the cell membrane.</p> Signup and view all the answers

<p>Water flows from high to low water concentration.</p> Signup and view all the answers

<p>An isotonic solution.</p> Signup and view all the answers

<p>The cell will lose water and shrink.</p> Signup and view all the answers

<p>Water leaves the cell, and the cell shrinks. This phenomenon is significant in the life of a cell as it affects the cell's size and shape, and is crucial for unicellular freshwater organisms and plant cells.</p> Signup and view all the answers

<p>The egg swells because water passes into it by osmosis. This observation is significant in understanding the concept of osmosis as it demonstrates the movement of water from an area of high concentration to an area of low concentration through a selectively permeable membrane.</p> Signup and view all the answers

<p>The concentration of solutes in the surrounding solution determines the direction of water movement across the cell membrane. If the surrounding solution is hypotonic, water moves into the cell, and if it is hypertonic, water moves out of the cell. This phenomenon is significant in the life of a cell as it affects the cell's size and shape, and is crucial for unicellular freshwater organisms and plant cells.</p> Signup and view all the answers

<p>Osmosis is significant in the life of a cell as it helps to regulate the cell's size and shape, and is crucial for unicellular freshwater organisms and plant cells. It also plays a key role in the absorption of water by plant roots, and is important for the exchange of gases and water in the life of a cell.</p> Signup and view all the answers

<p>In the first activity, water moves into the egg when it is placed in pure water, causing it to swell. In the second activity, water moves out of the egg when it is placed in a concentrated salt solution, causing it to shrink. The significance of this difference is that it demonstrates the direction of water movement depending on the concentration of solutes in the surrounding solution.</p> Signup and view all the answers

<p>Osmosis plays a key role in the absorption of water by plant roots, where water moves from the surrounding soil into the root cells. This process is crucial for the plant's overall function, as it allows the plant to absorb the necessary nutrients and water for growth and development.</p> Signup and view all the answers

<p>The observation that dried raisins or apricots swell when placed in water is significant as it demonstrates the process of osmosis, where water moves from an area of high concentration to an area of low concentration. The underlying mechanism behind this phenomenon is the movement of water through a selectively permeable membrane, resulting in the swelling of the raisins or apricots.</p> Signup and view all the answers

<p>Osmosis contributes to the exchange of gases and water in the life of a cell by allowing the movement of water and gases across the cell membrane. This process is significant in the cell's overall function as it allows the cell to maintain homeostasis and regulate its internal environment.</p> Signup and view all the answers

<p>The observation that the egg shrinks when placed in a concentrated salt solution is significant as it demonstrates the process of osmosis, where water moves from an area of high concentration to an area of low concentration. The underlying mechanism behind this phenomenon is the movement of water out of the egg through a selectively permeable membrane, resulting in the shrinkage of the egg.</p> Signup and view all the answers

<p>The cell will gain water by osmosis and swell up because the outside solution has a higher water concentration than the cell, resulting in a net movement of water into the cell.</p> Signup and view all the answers

<p>The concentration of solutes in the solution compared to the cell determines the direction of water movement across the plasma membrane during osmosis.</p> Signup and view all the answers

<p>In an isotonic solution, the cell will maintain its shape and size because the concentration of water is equal to that of the cell, resulting in no net movement of water across the cell membrane.</p> Signup and view all the answers

<p>The cell would lose water by osmosis and shrink because the solution has a lower concentration of water than the cell, resulting in a net movement of water out of the cell.</p> Signup and view all the answers

<p>Osmosis is the net diffusion of water across a selectively permeable membrane toward a higher solute concentration, which is essential for maintaining cellular balance and preventing cell damage or death.</p> Signup and view all the answers

<p>The cell would lose water by osmosis and shrink because the solution has a higher concentration of solutes than the cell, resulting in a net movement of water out of the cell.</p> Signup and view all the answers

<p>A hypotonic solution has a lower concentration of solutes than the cell, causing water to enter the cell and swell, whereas a hypertonic solution has a higher concentration of solutes than the cell, causing water to leave the cell and shrink.</p> Signup and view all the answers

<p>The concentration of solutes in the solution compared to the cell determines whether a solution is hypotonic, isotonic, or hypertonic to a cell.</p> Signup and view all the answers

<p>Osmosis is a special case of diffusion that occurs through a selectively permeable membrane, and it plays a crucial role in the exchange of gases and water in the life of a cell.</p> Signup and view all the answers

<p>The egg swells because water passes into it by osmosis, as the surrounding water has a lower solute concentration than the egg.</p> Signup and view all the answers

<p>The results demonstrate that water moves into the raisins or apricots when they are placed in water, causing them to swell, and moves out when they are placed in a concentrated solution, causing them to shrink.</p> Signup and view all the answers

<p>The selectively permeable nature of the cell membrane allows certain substances to pass through while restricting others, enabling the cell to regulate its internal environment through osmosis.</p> Signup and view all the answers

<p>Unicellular freshwater organisms and plant cells tend to gain water through osmosis because they are surrounded by a hypotonic environment, and this process is essential for their survival and functioning.</p> Signup and view all the answers

<p>Diffusion is the random movement of particles from an area of higher concentration to an area of lower concentration, while osmosis is a special case of diffusion that occurs through a selectively permeable membrane.</p> Signup and view all the answers

<p>The egg shrinks because water passes out of the egg into the salt solution by osmosis, as the surrounding salt solution has a higher solute concentration than the egg.</p> Signup and view all the answers

<p>The activities demonstrate the importance of osmosis in regulating the movement of water into and out of the cell, which is essential for the cell's survival and functioning.</p> Signup and view all the answers

<p>Absorption of water by plant roots is an example of osmosis, where water moves from the surrounding soil into the root cells, enabling the plant to absorb the necessary nutrients and water.</p> Signup and view all the answers

<p>The concentration of solutes in the surrounding solution.</p> Signup and view all the answers

<p>The cell's surroundings, either being more dilute or concentrated, affects the movement of water molecules, causing the cell to either gain or lose water.</p> Signup and view all the answers

<p>The cell will lose water by osmosis, resulting in a hypertonic solution.</p> Signup and view all the answers

<p>It allows water molecules to pass through while restricting the movement of solutes.</p> Signup and view all the answers

<p>When the cell is placed in an isotonic solution, where the concentration of water is equal to that of the cell.</p> Signup and view all the answers

<p>The cell will gain water by osmosis, causing it to swell.</p> Signup and view all the answers

<p>It helps to regulate the movement of water and solutes across the cell membrane, maintaining cellular homeostasis.</p> Signup and view all the answers

<p>The concentration of solutes in the solution compared to the concentration of solutes in the cell.</p> Signup and view all the answers

<p>The egg swells because water passes into it by osmosis as the water concentration is higher outside the egg than inside.</p> Signup and view all the answers

<p>A higher concentration of a solution outside the cell causes water molecules to move out of the cell, while a lower concentration causes water molecules to move into the cell.</p> Signup and view all the answers

<p>The dried raisins or apricots lose water and shrink because the concentrated solution has a lower water concentration than the raisins or apricots.</p> Signup and view all the answers

<p>They tend to gain water through osmosis because they are surrounded by a hypotonic solution, which has a higher water concentration than the cell.</p> Signup and view all the answers

<p>The cell membrane acts as a selectively permeable barrier, allowing water molecules to move in and out of the cell while controlling the movement of other substances.</p> Signup and view all the answers

<p>The thin outer skin of the egg allows water molecules to pass through by osmosis, causing the egg to swell or shrink depending on the surrounding solution.</p> Signup and view all the answers

<p>Osmosis is important for the exchange of gases and water in the life of a cell, and it helps to maintain the cell's overall function and structure.</p> Signup and view all the answers

<p>Osmosis can cause a cell to swell or shrink depending on the concentration of the surrounding solution, leading to changes in the cell's volume.</p> Signup and view all the answers

<p>The concentration of a solution determines the direction of water movement through the cell membrane, with water moving from an area of higher concentration to an area of lower concentration.</p> Signup and view all the answers

<p>The amount of substance dissolved in water affects the movement of water across the plasma membrane.</p> Signup and view all the answers

<p>Hypotonic solution</p> Signup and view all the answers

<p>There is no net movement of water across the cell membrane.</p> Signup and view all the answers

<p>Hypertonic solution</p> Signup and view all the answers

<p>The cell will lose water.</p> Signup and view all the answers

<p>The concentration of solutes in the solution and the cell.</p> Signup and view all the answers

<p>The cell will gain water and swell.</p> Signup and view all the answers

<p>There is no net movement of water across the cell membrane.</p> Signup and view all the answers

<p>The primary mechanism is osmosis, where water moves from an area of high concentration (pure water) to an area of low concentration (egg), causing the egg to swell.</p> Signup and view all the answers

<p>The selective permeability of the cell membrane allows certain molecules to pass through while restricting others, enabling osmosis to occur. If the membrane was not selectively permeable, osmosis would not occur, and the cell would not be able to maintain its internal environment.</p> Signup and view all the answers

<p>The underlying principle is osmosis, where water moves from an area of high concentration (plain water) to an area of low concentration (dried raisins or apricots), causing them to swell.</p> Signup and view all the answers

<p>The concentration of solutes affects the direction of water movement, with water moving from an area of high concentration to an area of low concentration. This affects cellular functions, as changes in water concentration can impact cellular activities and balance.</p> Signup and view all the answers

<p>Osmosis is a special case of diffusion through a selectively permeable membrane, allowing cells to maintain their internal environment and balance. It is essential for cellular functions and survival.</p> Signup and view all the answers

<p>Osmosis enables plant roots to absorb water, which is essential for plant growth and development. Water absorption via osmosis allows plants to maintain their internal environment and balance, promoting healthy growth and development.</p> Signup and view all the answers

<p>The selectively permeable membrane allows osmosis to occur, enabling cells to maintain their internal environment and balance. It allows certain molecules to pass through while restricting others, which is essential for cellular functions.</p> Signup and view all the answers

<p>The activity demonstrates the importance of osmosis by showing how the egg swells when placed in pure water and shrinks when placed in a concentrated salt solution. This reveals that osmosis is essential for maintaining cellular balance and that changes in water concentration can impact cellular activities.</p> Signup and view all the answers

<p>Osmosis is essential for maintaining cellular balance, as it allows cells to regulate their internal environment and respond to changes in their surroundings. This is critical for cellular functions and survival, as imbalances can lead to cellular damage or death.</p> Signup and view all the answers

<p>To stain the cells and make them visible under the microscope.</p> Signup and view all the answers

<p>To provide support and protection to the cell, allowing it to withstand changes in the surrounding medium.</p> Signup and view all the answers

<p>The cell swells due to the uptake of water by osmosis, and can eventually burst if the cell wall is not present.</p> Signup and view all the answers

<p>Because they have a cell wall that provides support and protection to the cell.</p> Signup and view all the answers

<p>To observe the structure of cells and understand the fundamental unit of life.</p> Signup and view all the answers

<p>Only living cells are able to absorb water by osmosis, while dead cells are not.</p> Signup and view all the answers

<p>To observe human cells and understand the fundamental unit of life.</p> Signup and view all the answers

<p>Because cells are microscopic structures that require magnification to be observed.</p> Signup and view all the answers

<p>Living cells can absorb water by osmosis, while dead cells cannot.</p> Signup and view all the answers

<p>Osmosis is essential for cellular functions, enabling cells to maintain their shape and structure.</p> Signup and view all the answers

<p>to provide structural strength</p> Signup and view all the answers

<p>It undergoes plasmolysis, or shrinkage of the cell contents away from the cell wall.</p> Signup and view all the answers

<p>To observe the structure and movement of chloroplasts.</p> Signup and view all the answers

<p>To control the movement of substances in and out of the cell.</p> Signup and view all the answers

<p>It causes the cell to shrink due to osmosis.</p> Signup and view all the answers

<p>To facilitate photosynthesis.</p> Signup and view all the answers

<p>Because it allows certain substances to pass through while restricting others.</p> Signup and view all the answers

<p>To kill the cells.</p> Signup and view all the answers

<p>The cell will shrink due to osmosis.</p> Signup and view all the answers

<p>The cell wall provides structural strength to plants.</p> Signup and view all the answers

<p>Plasmolysis is the contraction of the contents of the cell away from the cell wall when a living plant cell loses water through osmosis. It can be observed by placing a strong solution of sugar or salt on a mounted leaf on a slide and observing under a microscope.</p> Signup and view all the answers

<p>Chlorophyll is a green substance that is essential for photosynthesis.</p> Signup and view all the answers

<p>In a living cell, plasmolysis occurs when it loses water through osmosis, whereas in a dead cell, plasmolysis does not occur.</p> Signup and view all the answers

<p>The plasma membrane acts as a selectively permeable membrane, allowing certain substances to pass through while restricting others.</p> Signup and view all the answers

<p>Observing chloroplasts allows us to understand the site of photosynthesis in plant cells.</p> Signup and view all the answers

<p>Substances like CO2 and water move in and out of the cell through the plasma membrane, which acts as a selectively permeable membrane.</p> Signup and view all the answers

<p>The microscope allows us to observe the small structures of the plant cell, such as chloroplasts, that are not visible to the naked eye.</p> Signup and view all the answers

<p>Understanding the structure and function of plant cells is essential for understanding the life processes of plants and their role in the ecosystem.</p> Signup and view all the answers

<p>To permit the cells to withstand very dilute external media without bursting.</p> Signup and view all the answers

<p>To stain the cells and observe them more clearly.</p> Signup and view all the answers

<p>Cells from our own body.</p> Signup and view all the answers

<p>They tend to take up water by osmosis and swell.</p> Signup and view all the answers

<p>Because they are able to absorb water through their plasma membrane.</p> Signup and view all the answers

<p>Safranin solution or methylene blue solution.</p> Signup and view all the answers

<p>To differentiate regions of the cells based on their chemical composition.</p> Signup and view all the answers

<p>Differential staining of regions based on their chemical composition.</p> Signup and view all the answers

<p>To compare and understand the differences and similarities between cells from various sources.</p> Signup and view all the answers

<p>The primary function of cell walls is to permit the cells to withstand very dilute external media without bursting, and they contribute to this by exerting an equal pressure against the swollen cell.</p> Signup and view all the answers

<p>Different regions of cells get colored differentially due to their varying chemical compositions, resulting in distinct staining patterns.</p> Signup and view all the answers

<p>Observing cells from an onion peel allows us to study the structure and function of plant cells, and infer that only living cells are able to absorb water by osmosis.</p> Signup and view all the answers

<p>It is necessary to use a stain to visualize the cells' structure, and without it, we would not be able to observe the cells clearly.</p> Signup and view all the answers

<p>The cell wall exerts an equal pressure against the swollen cell, allowing the cell to maintain its integrity and withstand changes in the surrounding medium.</p> Signup and view all the answers

<p>Only living cells are able to absorb water by osmosis, while dead cells are not.</p> Signup and view all the answers

<p>Observing cells from the human body allows us to study the structure and function of animal cells, and gain insight into the characteristics of living cells.</p> Signup and view all the answers

<p>The cell membrane's selectively permeable nature allows it to regulate the flow of water and solutes, enabling the cell to survive in environments with varying concentrations of solutes.</p> Signup and view all the answers

<p>The activity allows us to obtain cells from the human body, which can be used to study the structure and function of animal cells, and gain insight into the characteristics of living cells.</p> Signup and view all the answers

<p>The primary function of the cell wall is to provide structural strength to plants. It is composed of cellulose, a complex substance that gives plants their shape and support.</p> Signup and view all the answers

<p>Plasmolysis is the phenomenon where the cell contents shrink away from the cell wall when a living plant cell loses water through osmosis. It can be observed by mounting a Rhoeo leaf peel in water on a slide and examining it under a microscope.</p> Signup and view all the answers

<p>The plasma membrane is selectively permeable, allowing certain substances to pass through while keeping others out. This allows the cell to control what enters and leaves the cell.</p> Signup and view all the answers

<p>The cell wall provides structural strength to plants, supports the plant's shape, and helps to maintain the internal pressure of the cell.</p> Signup and view all the answers

<p>Chlorophyll is a green substance found in chloroplasts that plays a crucial role in photosynthesis. It can be observed in Rhoeo leaf cells under a microscope as small green granules.</p> Signup and view all the answers

<p>Osmosis is the movement of water molecules from an area of high concentration to an area of low concentration through a selectively permeable membrane. In plant cells, osmosis affects the movement of water in and out of the cell, leading to changes in cell size and shape.</p> Signup and view all the answers

<p>The selectively permeable nature of the plasma membrane allows certain substances to pass through while keeping others out, regulating the movement of substances in and out of the cell.</p> Signup and view all the answers

<p>The concentration of solutes in the surrounding solution affects the movement of water across the cell membrane through osmosis. If the surrounding solution has a higher solute concentration, water will move out of the cell, and if it has a lower solute concentration, water will move into the cell.</p> Signup and view all the answers

<p>The nucleus is the control center of the cell, containing most of the cell's genetic material. It plays a crucial role in regulating cell growth and division.</p> Signup and view all the answers

<p>Plasmolysis helps to demonstrate the contraction of the cell contents away from the cell wall, indicating the cell's ability to lose water through osmosis. It showcases the selective permeability of the plasma membrane and the importance of the cell wall in providing structural support.</p> Signup and view all the answers

<p>Cellulose provides structural strength to the plant cell, allowing it to maintain its shape and withstand external forces. It enables the cell to grow and develop, while also protecting the cell's contents from the environment.</p> Signup and view all the answers

<p>The selectively permeable plasma membrane allows certain substances to pass through while restricting others, controlling the exchange of materials between the cell and its environment. This regulation is essential for maintaining cellular homeostasis and facilitating various cellular processes.</p> Signup and view all the answers

<p>Chloroplasts contain the green pigment chlorophyll, which enables plant cells to undergo photosynthesis, producing energy for the cell. This process is essential for the cell's survival and growth.</p> Signup and view all the answers

<p>The activity demonstrates the effect of osmosis on living and dead plant cells, showcasing the cells' ability to respond to changes in their environment. It highlights the importance of the cell wall and plasma membrane in regulating the movement of substances in and out of the cell.</p> Signup and view all the answers

<p>The cell wall provides structural support, while the plasma membrane regulates the movement of substances in and out of the cell. Together, they maintain cellular homeostasis by controlling the exchange of materials between the cell and its environment.</p> Signup and view all the answers

<p>Plasmolysis demonstrates the contraction of the cell contents away from the cell wall in living cells, which is not observed in dead cells. This highlights the importance of the cell's ability to regulate its internal environment and respond to external changes.</p> Signup and view all the answers

<p>The rigid cell wall provides structural support, enabling the cell to maintain its shape and withstand external forces. This allows the cell to respond to environmental changes, such as changes in osmotic pressure, without compromising its integrity.</p> Signup and view all the answers

<p>The selectively permeable plasma membrane regulates the movement of substances in and out of the cell, maintaining the cell's internal environment and homeostasis. This ensures the cell's proper functioning and survival.</p> Signup and view all the answers

<p>To permit the cells to withstand very dilute (hypotonic) external media without bursting.</p> Signup and view all the answers

<p>To stain the cells and observe the differential coloring of different regions based on their chemical composition.</p> Signup and view all the answers

<p>That living cells have a selectively permeable membrane that allows for osmosis.</p> Signup and view all the answers

<p>To observe the structure and function of human cells and understand their role in the body.</p> Signup and view all the answers

<p>By regulating the movement of water into or out of the cell, maintaining cellular balance and preventing bursting or shrinking.</p> Signup and view all the answers