3.3.1 Surface area:volume Flashcards
1
Q
Single celled organisms
- type of oxygen diffusion?
- high or low SA:V?
A
- direct diffusion of oxygen
- Very high SA:V - absorbs oxygen through its membrane
2
Q
Flatworm
- diffusion of oxygen?
- high or low SA:V?
A
- direct diffusion
- Flat, short diffusion distance
- High SA:V
3
Q
Small mammal
A
Use lungs and circulation
- High SA:V, loses more heat per gram of body
- faster rate of respiration, maintain constant body temp.
4
Q
Big mammal
A
Uses lungs and circulation
Smaller SA:V , loses less heat per gram of body, slower rate of respiration/ uses less O2