Biology- Diffusion And Osmosis

Question 1

What is diffusion

Answer 1

The net movement of particles from an area of high —-> low concentration until they are evenly spread out

Question 2

What are the factors affecting diffusion

Answer 2

• the concentration gradient
• the temperature
• the surface area of the membrane

Question 3

What is osmosis

Answer 3

The diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane

Question 4

What is active transport

Answer 4

It moves substances from a low concentration gradient to a high concentration using energy from respiration

Question 5

What does active transport allow

Answer 5

-it allows mineral ions to be absorbed by plant root cells from very dilute solutions in the soil
- it also allows sugar molecules to be absorbed from lower concentrations in the gut