Cell Transport

Front

What do protein pumps do?

Back

Protein pumps use energy (ATP) to move molecules like sodium and potassium across the membrane.

Front

What is the movement of molecules from a higher concentration to a lower concentration called?

Back

Diffusion.

Front

Give an example of diffusion.

Back

Red food coloring moving through water until the water is pink.

Front

What is cell 'eating' referred to as?

Back

Endocytosis.

Front

A membrane that lets only some things pass through is ___________ permeable.

Back

Selectively.

Front

What is passive transport?

Back

The movement of molecules across a cell membrane without the use of energy.

Front

What is active transport?

Back

The movement of molecules against their concentration gradient, requiring energy (ATP).

Front

What is osmosis?

Back

The diffusion of water molecules across a selectively permeable membrane.

Front

What is the role of the cell membrane?

Back

To protect the cell and regulate what enters and leaves the cell.

Front

What is exocytosis?

Back

The process by which a cell expels materials in vesicles.