Biology: Passive and Active Transport

Front

What is passive transport?

Back

The movement of materials across the cell membrane that requires NO ENERGY from the cell.

Front

What is active transport?

Back

The movement of materials against a concentration gradient, requiring energy (ATP) from the cell.

Front

What is diffusion?

Back

The movement of molecules from an area of high concentration to an area of low concentration.

Front

What is osmosis?

Back

The diffusion of water molecules through a selectively permeable membrane.

Front

What is selective permeability?

Back

The ability of the cell membrane to allow some things to pass through while preventing others.

Front

What happens to a cell in a hypertonic solution?

Back

The cell will lose water and may shrink.

Front

What happens to a cell in a hypotonic solution?

Back

The cell will gain water and may swell or burst.

Front

What is homeostasis?

Back

The process by which a cell maintains a stable internal environment.

Front

What role does ATP play in active transport?

Back

ATP provides the energy needed for transport proteins to move substances against their concentration gradient.

Front

What is an example of a substance that uses active transport?

Back

Glucose and ions like sodium and potassium.