Cell Membrane and Transport

Front

What is the main function of the cell membrane?

Back

Regulate what enters and exits the cell.

Front

Osmosis is the movement of _____ across a membrane.

Back

Water.

Front

What is an important difference between passive and active transport?

Back

Active transport uses energy; passive transport does not.

Front

True or false: Regulating what enters and exits the cell helps the cell maintain homeostasis.

Back

True.

Front

What process involves the movement of water molecules from high to low concentration through a selectively permeable membrane?

Back

Osmosis.

Front

Define cell membrane.

Back

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

Front

What is passive transport?

Back

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

Front

What is active transport?

Back

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

Front

What is a selectively permeable membrane?

Back

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

Front

What is diffusion?

Back

The process by which molecules spread from areas of high concentration to areas of low concentration.