Movement of substances around the cell

Question 1

What is diffusion?

Answer 1

Diffusion is the process of a substance from an area of high concentration to an area of low concentration. Effectively, it is particles bouncing off against each other until equilibrium is reached

Question 2

What is osmosis?

Answer 2

Osmosis is the diffusion of water molecules from a dilute solution (high concentration of water) to a more concentrated solution (low concentration of water) across a selectively permeable membrane.

Question 3

What is active transport?

Answer 3

Active transport is diffusion against the concentration gradient. It requires energy.