Surface Area:Volume Ratio

Question 1

Do smaller organisms have a smaller or larger SA:Vol ratio?

Answer 1

Larger.

Question 2

What are the steps to calculate the ratio?

Answer 2

1. Work out surface area
   2.Work out volume
   3.Divide both values by volume (leave answers as a decimal).

Question 3

Why is it good to have a higher surface are: volume ratio?

Answer 3

-Faster rate of diffusion.

Question 4

What things can increase the rate of diffusion?

Answer 4

-Larger surface are: volume ratio.
-Steepness of concentration gradient.
-Distance over where diffusion is taking place/ diffusion pathway.

Question 5

What substances are transported into and out of cells for respiration?

Answer 5

IN- oxygen and glucose.
OUT- carbon dioxide and water.