Front

Why is diffusion important in biology?

Back

It allows substances to move across cell membranes.

Front

What does it mean that the cell membrane is selectively permeable?

Back

Certain things can enter while others cannot.

Front

True or False: Active transport can move substances from areas of lower concentration to higher concentration.

Back

True.

Front

What is osmosis?

Back

The movement of water across a membrane.

Front

Why does tea move out of the tea bag into the water?

Back

There is a higher concentration of tea in the bag and less in the water.

Front

What is diffusion?

Back

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

Front

What is the role of the cell membrane?

Back

To control what enters and leaves the cell.

Front

What is the difference between passive and active transport?

Back

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

Front

What is concentration gradient?

Back

The difference in concentration of a substance between two areas.

Front

What happens during osmosis?

Back

Water moves from an area of low solute concentration to an area of high solute concentration.