Specialised Cells Flashcards
How are palisade leaf cells adapted?
Packed with chloroplasts for photosynthesis, Tall shape means a lot of surface area exposed for absorbing CO2, Thin shape so lots can be packed at top of leaf
Why are guard cells adapted?
To open and close pores
Name three ways in which guard cells are adapted…
Special kidney shape which opens and closes the stomata in a leaf, when the plant is short of water the guard cells lose water and become flaccid making the stomata close stopping too much water vapour escaping, thin outer walls and thickened inner walls.
Why are red blood cells adapted?
To carry oxygen
How are red blood cells adapted?
Concave shape gives a big surface area for absorbing oxygen, packed with haemoglobin that absorbs oxygen and have no nucleus to leave more room for haemoglobin .
Why are sperm and egg cells specialised?
For reproduction
How is the egg cell specialised?
It contains huge food reserves to feed the embryo, the eggs membrane instantly changes its structure when fused with sperm to stop more sperm getting in
How are sperm cells specialised
Lot of mitochondria to provide energy, long tail and streamlined head to help it swim to egg.
Why do sperm carry enzymes in their head?
To digest through the egg cell membrane.
What are palisade leaf cells adapted for?
Photosynthesis
