Exchange Of Materials Flashcards
1
Q
How do cells and humans take in oxygen?
A
Diffusion
2
Q
How do cells take up oxygen?
A
The cell has a large SA/V ratio
There is a high rate of diffusion
3
Q
How do humans take up oxygen?
A
The outside of the body has a small SA/V ratio, therefore diffusion through the body surface isn’t possible.
We take in oxygen and breathe out carbon dioxide . This is a mechanical process.
4
Q
What gases do humans exchange?
A
We uptake oxygen (respiration)
We release carbon dioxide (waste product)
