U3 - respiratory and circulatory systems in humans

Question 1

properties that improvment of gases

Answer 1

permeability, large SA:V, short diffusion pathway, and moist surface for easy diffusion

Question 2

adaptations of rbc’s (3 points)

Answer 2

1. biconcave shape and small size of 8mm gives large SA:V ratio.
2. also has no nucleus which allows more room for hemoglobin
3. shape allows rbc to load/unload oxygen molecules quickly

Question 3

properties of concentration gradient

Answer 3

the greater the concentration gradient, the greater the rate of diffusion

Question 4

properties of dense network of blood cells