2.3A The need for a transport system

Question 1

3 factors to consider

Answer 1

1. size
2. metabolic activity
3. surface area to volume ratio

Question 2

size

Answer 2

in large animals, diffusion pathway is too large to supply everything needed for metabolic activity
(simply via diffusion)

Question 3

metabolic activity

Answer 3

very active animals require a greater supply of glucose + oxygen for respiration

Question 4

surface area to volume ratio

Answer 4

the larger the organism, the smaller the surface area to volume ratio.