6.4 gas exchange in the leaf of a plant Flashcards
1
Q
describe how plants exchange gases
A
it occurs by diffusion in the leaves
volumes and types of gases depends on the balance between respiration and photosynthesis
2
Q
describe the structure of a dicotyledonous plant leaf
A
waxy cuticle
upper epidermis
palisade mesophyll
vascular bundle
spongy mesophyll
lower epidermis
guard cells
stoma
3
Q
explain the adaptations of leaves for efficient gas exchange
A
Many stomata
Air gaps in the spongy mesophyll
4
Q
how is stomata an adaptation for efficient gas exchange?
A
allows gases to enter
many stomata so short diffusion pathway to cells
5
Q
how do air gaps help with efficient gas exchange in plant leafs?
A
increases surface area for diffusion to occur in the cells
allows gases to easily diffuse (rapid diffusion + short diffusion pathway)
