specialised cells part 1 Flashcards
what are palisade leaf cells adapted for?
photosynthesis
what are palisade leaves packed with?
chloroplasts
where are the chloroplasts located in the palisade leaf cells?
at the top of the cell, so they’re nearer to the light
what shape are the palisade leaf cells and why are they shaped like that?
they are shaped tall which means they have a lot of surface area to absorb carbon dioxide from the air
are palisade cells thick or thin? and why?
thin. so they can pack loads of these cells at the top of the leaf
what are guard cells adapted for?
to open and close pores
what shape are guard cells and how do they work?
kidney shaped which opens and closes the stomata (pores) in a leaf
what happens to the guard cells when the plant is filled with lots of water?
it goes plump and turgid. this makes the stomata open so gases can be exchanged by photosynthesis.
when the plant is short of water what happens to the guard cells?
they become flaccid (weak). which makes the stomata close this way it also stops water vapours from escaping
are guard cells thin or thick?
both. thin from the outside and thick from the inside
what are guard sensitive to?
light. as it closes at night to save water
what do guard cells control?
water loss within the leaf
