Cells

Question 1

What is diffussion?

Answer 1

Diffusion is the net movement of molecules of a liquid or a gas from an area of high or low concentration as a result of the random movement of molecules.

Question 2

What is osmosis?

Answer 2

Ósmosis is a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one.

Question 3

What are the effects of osmosis on animal cells?

Answer 3

Animal cells don’t have cell walls so when osmosis occurs, the cell bursts open and after water diffuses out of the cell, the cell then starts to shrink.

Question 4

What are the effects of osmosis in plant cells?

Answer 4

Plant cells have a cell wall but water enters and starts to swell. The cell wall prevents it from bursting, but the plant cell becomes turgid.

Question 5

What factors affect the rate of diffusion?

Answer 5

• Temperature
• Density
• Concentration gradient