Diffusion

Question 1

What is diffusion?

Answer 1

The random movement of particles from an area of high concentration to an area of low concentration through a semi permeable membrane

Question 2

Where can diffusion happen?

Answer 2

Solutions and gases

Question 3

How does concentration difference between two substances affect the diffusion rate?

Answer 3

The bigger the difference in concentration the faster the diffusion rate

Question 4

What do cell membranes do?

Answer 4

Hold the cell together

Slopes substances to move in and out of the cell through diffusion

Question 5

What molecules can and can’t diffuse through cell membranes?

Answer 5

Small molecules like oxygen and glucose can

Big molecules like starch and protein can’t

Question 6

In what direction do the particles move?

Answer 6

Both directions but since there’s more on one side there’s a net movement from that side

Question 7

Explain diffusion in the lungs?

Answer 7

Oxygen diffuses from the alveoli to the blood which then circulates the body

Question 8

Explain diffusion in the gut?

Answer 8

Digested products diffuse from the gut into the capillaries in the villi of the small intestine

Question 9

Give an example of diffusion in plants?

Answer 9

Carbon dioxide diffuses from air space between mesophyll cell into chloroplasts

Oxygen diffuses out of stomata carbon dioxide diffuses in