Exchange Flashcards
1
Q
What things are exchanged between an organism and it’s environment
A
Respiratory gases
Nutrients
Excretory products
Heat
2
Q
What does a large sa:vol ratio do
A
Increases rate of exchange
3
Q
What does an exchange surface being thin do
A
Diffusion distance short- materials cross exchange surface rapidly
4
Q
What’s Ficks Law
A
Diffusion is proportional to surface area x difference in conc. / length of diffusion pathway
