exchange and transport Flashcards
1
Q
how do air spaces maximise gas exchange
A
they allow gases to diffuse easily within the leaf
2
Q
how do leaves maximise gas exchange
A
they are thin so it reduces diffusion distance
3
Q
how do palisade and spongy mesophyll maximise gas exchange
A
many cells are packed together to increase surface area
4
Q
how do stomata maximise gas exchnage
A
they allow gases to travel in and out of leaves
5
Q
what structures in leaves maximise gas exchange
A
air spaces
leaves
palisade and spongy mesophyll
stoma
6
Q
do big organisms have bigger or smaller surface areas
A
smaller
7
Q
what is rate of diffusion dependent on
A
diffusion distance
surface area
8
Q
how do bigger organisms adapt to their small surface area
A
specialised exchange systems (increase surface area) transport systems (reduce diffusion distance)
9
Q
what is the rate of diffusion across an exchange surface dependent on
A
surface thickness ( thinner = faster ) concentration gradient ( bigger = faster ) surface area ( higher = faster )
