Exchange Of Materials Flashcards
1
Q
What are some different ways organisms take substances in and how they get rid of them?
A
Cells need oxygen for aerobic respiration this produces carbon dioxide as a water product
Water is taken up by osmosis
Urea diffuses from cells to the blood plasma for removal
2
Q
What is the thing that determines the how easy it is for an organism to do its exchanges?
A
The surface area to volume ratio (SA:V)
3
Q
How do you compare the surface area to volume?
A
By working out the surface areas and comparing them.
