B1: Diffusion and Osmosis and exchange

Question 1

Why is diffusion important for cells?

Answer 1

Diffusion is important for cells because it helps us deliver nutrients and remove waste products.

Question 2

What are the factors that increase the rate of diffusion?

Answer 2

1. Increase the concentration gradient (a bigger difference between the two areas).
2. Temperature - the higher the temperature, the faster diffusion will be.
3. The surface area of the exchange surface.
4. Shorter diffusion distance.

Question 3

What is lysis?

Answer 3

the breaking down of the membrane of a cell

Question 4

What is crenation?

Answer 4

The shrinkage of cells

Question 5

Is diffusion up or down the concentration gradient?

Answer 5

It is down the concentration gradient

Question 6

Will the surface area to volume ratio be larger or smaller, the smaller the organism?

Answer 6

It would be larger