Cell Transport

Front

What is osmosis?

Back

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

True or False: Osmosis requires energy to occur.

Back

False

Front

What is diffusion?

Back

Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration.

Front

What is the direction of diffusion?

Back

High to low.

Front

What happens to red blood cells in a hypertonic solution?

Back

They lose water and may become shriveled.

Front

What does it mean for a membrane to be partially permeable?

Back

It allows some molecules to pass through it while blocking others.

Front

True or False: Active transport moves molecules down their concentration gradients.

Back

False

Front

What is active transport?

Back

Active transport is the movement of molecules against their concentration gradient, requiring energy.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two areas.

Front

What is an example of passive transport?

Back

Diffusion and osmosis are examples of passive transport.