Transport of Substances B2

Question 1

What is diffusion?

Answer 1

Diffusion is the net movement of particles from an area of high concentration to an area of low concentration.

Question 2

What is active transport?

Answer 2

Active transport is the net movement of particles from an area of low concentration to an area of high concentration.

Question 3

What is osmosis?

Answer 3

Osmosis is the net movement of water molecules from an area of high concentration to an area of low concentration through a partially permeable membrane.

Question 4

Describe a partially permeable membrane.

Answer 4

A partially permeable membrane is a membrane with very small holes in it so that only tiny molecules like water can pass through it but larger molecules can’t.

Question 5

What is water potential?

Answer 5

Water potential is the likelihood of water molecules to diffuse in or out of a solution (e.g. a solution with a high water potential is a high concentrated solution of water)