Topic 1 - Diffusion, Osmosis And Active Transport

Question 1

What is diffusion?

Answer 1

The overall net movement of particles from an area of high concentration to an area of low concentration. Down a concentration gradient

Question 2

What are the substances transported in diffusion?

Answer 2

carbon dioxide, water, food substances

Question 3

What is osmosis?

Answer 3

The net movement of water molecules from an areas of higher free water concentration to an area of lower free water concentration. Down a concentration gradient and across a semi permeable membrane

Question 4

What are the substances transported in osmosis?

Answer 4

water

Question 5

What is active transport?

Answer 5

the net movement of molecules from an area of lower concentration to an area of higher concentration against a concentration gradient. This requires energy and transport proteins embedded in cell membranes

Question 6

What substances are transported in active transport?

Answer 6

mineral ions into plant roots