STAAR Biology Category 1 Review

Front

What are stem cells?

Back

Stem cells are undifferentiated cells that can turn into other types of cells.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What is diffusion?

Back

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of spontaneous passive transport of molecules across a cell membrane via specific transmembrane integral proteins.

Front

What is the role of energy in active transport?

Back

Energy is required in active transport to move substances against their concentration gradient.

Front

What are the differences between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy and moves substances against their concentration gradient.

Front

What is a cell membrane?

Back

A cell membrane is a biological membrane that separates and protects the interior of all cells from the outside environment.

Front

What is the function of stem cells in development?

Back

Stem cells play a crucial role in development by differentiating into various cell types needed for growth and repair.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others.