Biology Chapter Cells Quiz

The Cell Theory states that all living things are made up of cells, cells are the basic unit of structure and function in living things, and all cells come from pre-existing cells.

The size of a cell is typically measured in micrometers (µm), which are one millionth of a meter. Cells vary in size, but most are microscopic.

This ratio refers to the surface area of a cell compared to its volume.As a cell grows, its surface area increases at a slower rate than its volume. This can limit the cell's ability to take in nutrients and expel waste.

Cells regulate their internal environment to maintain a stable state, called homeostasis. They control the movement of substances across their membranes, adjust their pH, and maintain a constant temperature.

Cells acquire energy from their surroundings and convert it into a usable form, ATP (adenosine triphosphate). Sources of energy include sunlight (photosynthesis) or food (cellular respiration).

Cells respond to stimuli in their environment, such as changes in temperature, light, or chemical signals. This allows them to adapt and survive in their environment.

Cells have structures that protect them and support their shape. These structures can include cell walls, membranes, and internal cytoskeletons.

The development of the cell theory, a foundational concept in biology, is credited to scientists like Robert Hooke, Antonie van Leeuwenhoek, Matthias Schleiden, Theodor Schwann, and Rudolf Virchow.

The process where cells obtain and use energy from food molecules to perform vital functions like muscle contraction, blood pumping, and digestion.

Cells constantly adapt to changes in their environment by responding to signals like chemical shifts or temperature changes, ensuring internal stability.

The ability of cells to maintain their internal state within a stable range, despite external changes, through various internal processes.

Cells protect themselves from harmful substances and invaders through their membranes and specialized cells like immune cells.

Cells provide structural support and organization within an organism, contributing to the overall shape and function of tissues and organs.

The process where cells break down food molecules to release energy, often involving a series of chemical reactions.

Specialized cells of the immune system that identify and destroy harmful pathogens and foreign substances.

The outermost layer of a cell, controlling the passage of substances into and out of the cell, acting as a barrier and a communicator.

A German botanist who proposed that all plants are made up of cells in 1838.

A German physiologist who proposed that all animals are made up of cells in 1839.

A German physician who stated that cells can only arise from pre-existing cells in 1855.

The idea that new cells are formed by the division of pre-existing cells.

A fundamental part of the cell theory, stating that new cells do not appear spontaneously.

The smallest unit of life that can carry out all the processes necessary for life.

The scientific study of life.

A specialized tool that allows scientists to observe microscopic objects, like cells, which are too small to be seen with the naked eye.

A theory proposed in the 1600s which suggested that living organisms could spontaneously arise from non-living matter. This theory was later disproven by scientists like Francesco Redi.

Francesco Redi, an Italian scientist, challenged the Spontaneous Generation theory by showing that maggots only appeared on meat exposed to flies, proving that life arises from existing life forms.

The basic unit of life, the smallest structural and functional unit of a living organism. Cells make up all life forms, from single-celled bacteria to complex human beings.

Cells work together to perform specialized functions within a multicellular organism. Just like bricks build a house, multiple cells form tissues and organs.

Cells are incredibly diverse in size, shape, and function. Each cell is adapted to its specific role within an organism.

The idea that living things arise spontaneously from non-living matter; Disproven by Louis Pasteur's experiment.

The theory that all living things are composed of cells, cells are the basic unit of life, and all cells arise from pre-existing cells.

A scientist who observed cells for the first time under a microscope, describing the cells as "little boxes" in a piece of cork.

He disproved spontaneous generation with his famous swan-neck flask experiment.

A scientist who proposed that all plants are made of cells.

Cells are generally small in size, and require a microscope to be seen.

A cell's surface area must be large enough to support the volume of the cell, allowing for efficient exchange of nutrients and waste products.

Cells perform various functions, such as acquiring energy for cellular activities, responding to external stimuli, and regulating their internal environment.

The first part of this theory states that all living organisms are made up of one or more cells. This means that everything alive, from tiny bacteria to giant whales, is ultimately composed of these basic building blocks.

The second part states that cells are the fundamental unit of structure and function in all living organisms. This means that all the activities of life - growth, reproduction, metabolism, and so on - occur within cells.

The final part states that all cells arise from pre-existing cells. This means that new cells are not spontaneously generated, but rather come from the division of existing cells.

Imagine a small cut on your skin. The process of healing involves new cells replacing the damaged ones, demonstrating the principle that cells arise from pre-existing cells. This principle is crucial for tissue repair and growth in all living organisms.

Consider a person getting a sunburn. Their skin cells are damaged by the UV radiation. Our bodies respond by creating new cells to replace them, showing how cells can regenerate.