Diffusion

Question 1

What is diffusion?

Answer 1

Spreading out of particles from an area of high concentration to low concentration

Question 2

What diffuses into an animal cell?

Answer 2

1. During respiration, oxygen is being used so will diffuse into the cells whilst CO2 is being produced so will diffuse out of the cell
2. In digestion, glucose, fatty acids and amino acids will diffuse from the small intestine into the bloodstream
3. Water being absorbed back into the body from the large intestine

Question 3

What diffuses into the plant cells?

Answer 3

1. In the leaf, CO2 will diffuse into the leaf through the stomata whilst oxygen diffuses out
2. Water being lost in leaves from transpiration
3. Water being taken in from the soil into the roots

Question 4

What can diffuse through the cell membrane?

Answer 4

Glucose
Oxygen
Amino acids
Water

Question 5

What can’t diffuse through the membrane?

Answer 5

Starch and proteins