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Questions and Answers
Which subatomic particle is much lighter than protons and orbits around the nucleus at high speed?
Which subatomic particle is much lighter than protons and orbits around the nucleus at high speed?
What is the atomic number of an atom?
What is the atomic number of an atom?
What are atoms of an element with different numbers of neutrons in the nucleus called?
What are atoms of an element with different numbers of neutrons in the nucleus called?
What is the average mass of an element's atoms called?
What is the average mass of an element's atoms called?
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What are atoms or molecules that have an electric charge called?
What are atoms or molecules that have an electric charge called?
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What type of bond is created by the electrical attraction between anions and cations?
What type of bond is created by the electrical attraction between anions and cations?
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What type of covalent bond is formed when electrons are shared equally between atoms?
What type of covalent bond is formed when electrons are shared equally between atoms?
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Which of the following best describes the function of a negative feedback loop in homeostasis?
Which of the following best describes the function of a negative feedback loop in homeostasis?
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Which type of bond involves the sharing of electrons between atoms?
Which type of bond involves the sharing of electrons between atoms?
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Which of the following best describes the function of enzymes?
Which of the following best describes the function of enzymes?
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Which of the following best describes the function of the plasma membrane?
Which of the following best describes the function of the plasma membrane?
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Which of the following best describes osmosis?
Which of the following best describes osmosis?
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Which organelle is responsible for producing energy in the cell?
Which organelle is responsible for producing energy in the cell?
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Which process involves the movement of molecules from an area of high concentration to an area of low concentration?
Which process involves the movement of molecules from an area of high concentration to an area of low concentration?
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Which one of the following is NOT a common function of all living things?
Which one of the following is NOT a common function of all living things?
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What is the increase in size of an organism through cell growth or the addition of new cells called?
What is the increase in size of an organism through cell growth or the addition of new cells called?
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What is the sum of all chemical operations occurring in the body and provides energy for other functions?
What is the sum of all chemical operations occurring in the body and provides energy for other functions?
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What is the state of internal balance or stable internal environment that must be maintained for survival called?
What is the state of internal balance or stable internal environment that must be maintained for survival called?
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What form of homeostatic regulation corrects variations back to the normal range?
What form of homeostatic regulation corrects variations back to the normal range?
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What reinforces or exaggerates the original stimulus, often involved in potentially dangerous processes?
What reinforces or exaggerates the original stimulus, often involved in potentially dangerous processes?
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What are the anatomical concepts that include anatomical regions, directions, planes, and body cavities of the trunk called?
What are the anatomical concepts that include anatomical regions, directions, planes, and body cavities of the trunk called?
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Which organelle is responsible for protein synthesis and can be free or attached to the endoplasmic reticulum?
Which organelle is responsible for protein synthesis and can be free or attached to the endoplasmic reticulum?
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What is the control center of the cell and is surrounded by a double membrane called the nuclear envelope?
What is the control center of the cell and is surrounded by a double membrane called the nuclear envelope?
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Which process is responsible for the movement of molecules from an area of higher concentration to an area of lower concentration?
Which process is responsible for the movement of molecules from an area of higher concentration to an area of lower concentration?
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Which type of membrane protects joints?
Which type of membrane protects joints?
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What is the thin layer composed of lipids, proteins, and carbohydrates that surrounds the cell?
What is the thin layer composed of lipids, proteins, and carbohydrates that surrounds the cell?
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Which process is responsible for the movement of water across a selectively permeable membrane?
Which process is responsible for the movement of water across a selectively permeable membrane?
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What are small projections of the plasma membrane that increase the surface area of cells?
What are small projections of the plasma membrane that increase the surface area of cells?
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Which type of tissue covers external surfaces?
Which type of tissue covers external surfaces?
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What is the term for the specialization of cells into different types and the formation of tissues?
What is the term for the specialization of cells into different types and the formation of tissues?
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Study Notes
Cell Structure and Tissues
- Enzymes catalyze reactions in cells, with substrates binding to the enzyme's active site.
- The plasma membrane is extremely thin (6nm - 10nm) and composed of lipids, proteins, and carbohydrates.
- Transport processes include diffusion, osmosis, facilitated diffusion, active transport, endocytosis, and exocytosis.
- Osmotic flow is determined by the solute concentration, with isotonic, hypotonic, and hypertonic solutions affecting the cell's shape.
- The nucleus is the control center of the cell and is surrounded by a double membrane called the nuclear envelope.
- Microvilli are small projections of the plasma membrane that increase the surface area of cells.
- Cilia are long extensions of the plasma membrane that can be motile or nonmotile, used for movement and sensing signals.
- Ribosomes are responsible for protein synthesis and can be free or attached to the endoplasmic reticulum.
- The endoplasmic reticulum is a network of intracellular membranes with functions such as synthesis, storage, transport, and detoxification.
- Mitochondria provide energy for the cell through energy-producing reactions.
- Tumors can be benign or malignant, with the latter spreading through invasion and metastasis.
- Cellular differentiation occurs when specific genes are turned off, leading to the specialization of cells into different types and the formation of tissues.
- Epithelial tissue covers external surfaces, connective tissue provides support, mucous and serous membranes line passageways and cavities, synovial membranes protect joints, muscle tissue allows for contraction, and nervous tissue transmits electrical impulses.
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Description
Test your knowledge on cell structure and tissues with this quiz. Learn about enzymes, plasma membrane, transport processes, nucleus, microvilli, cilia, ribosomes, endoplasmic reticulum, mitochondria, tumors, cellular differentiation, and different types of tissues.
