2.4 Review

Front

What is diffusion?

Back

The movement of substances from an area of higher concentration to an area of lower concentration.

Front

What is the function of the cell membrane?

Back

A flexible covering that protects the inside of a cell from the environment outside the cell.

Front

Which process is NOT a type of passive transport?

Back

Exocytosis.

Front

Where is there a low concentration of dye in a cup?

Back

At the bottom of the cup.

Front

What is passive transport?

Back

The movement of substances through a cell membrane without using the cell's energy.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What is facilitated diffusion?

Back

A type of passive transport that uses transport proteins to move molecules across the membrane.

Front

What is active transport?

Back

The movement of substances against their concentration gradient, requiring energy.

Front

What is endocytosis?

Back

The process by which a cell takes in materials by engulfing them.

Front

What is exocytosis?

Back

The process by which a cell expels materials in vesicles.