Surface Area to Volume Ratio

Question 1

What kind of surface area to volume ratio to smaller organisms have?

Answer 1

large surface area to volume ratio

Question 2

What kind of surface area to volume ratio do larger organisms have?

Answer 2

smaller surface area to volume ratio

Question 3

What kind of surface area to volume ratio does a single celled organism have and how?

Answer 3

direct diffusion of oxygen

very high SA:Vol - absorb oxygen through its membrane

Question 4

What kind of surface area to volume ratio does a flat worm have and how?

Answer 4

direct diffusion of oxygen

flat - short diffusion distance to every high SA:Vol

Question 5

What surface area does a small mammal have?

Answer 5

high SA:Vol - loses more heat per gram of body - faster rate of respiration - more oxygen needed to maintain a constant body temperature

Question 6

What surface area to volume ratio does a big mammal have?

Answer 6

small - loses less heat per gram of body

slower rate of respiration

uses less oxygen