Cell Membrane and Cell Transport Flashcard

Front

What is the main function of the cell membrane?

Back

To control the movement of substances in and out of the cell.

Front

What is active transport?

Back

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

Front

What is an example of active transport?

Back

Sodium-potassium pump.

Front

What is passive transport?

Back

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

Front

What is an example of passive transport?

Back

Facilitated diffusion.

Front

What happens to a cell placed in a hypertonic solution?

Back

It shrinks.

Front

What is osmosis?

Back

The movement of water across a semipermeable membrane.

Front

What is a semipermeable membrane?

Back

A membrane that allows certain substances to pass while blocking others.

Front

What is diffusion?

Back

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

Front

What is endocytosis?

Back

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