Cell Membrane and Passive Transport

Front

What are two types of passive transport?

Back

Osmosis and diffusion.

Front

Why is passive transport called 'passive'?

Back

Because it occurs WITHOUT energy.

Front

What type of diffusion is characterized by the movement of molecules from an area of higher concentration to an area of lower concentration without the aid of transport proteins?

Back

Simple Diffusion.

Front

What is the primary function of the cell membrane?

Back

To protect the cell and regulate what enters and leaves.

Front

What term describes a membrane that allows some substances to pass while blocking others?

Back

A selectively permeable membrane.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What is diffusion?

Back

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

Front

What role do transport proteins play in facilitated diffusion?

Back

They help larger or polar molecules cross the cell membrane.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy, while active transport does.

Front

What is an example of a substance that moves through the cell membrane via osmosis?

Back

Water.