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21 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Name 3 specialised cells?
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Palisade leaf cells, guard cells, red blood cells, sperm cells and egg cells
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In what shape are palisade cells arranged for there specific need?
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Tightly packed near top of cell to absorb as much light as possible
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Why are palisade cells packed with chloroplasts?
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For photosynthesis to work as efficiently as possible
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Why are palisade cells tall shaped?
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Big surface area down side of cell to absorb carbon dioxide from the air
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Helps with photosynthesis
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Why are palisade cells thin?
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So lots can be packed at the top of the leaf to maximise photosynthesis
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How are guard cells adapted?
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They are adapted to open and close pores in a leaf
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How is the guard cells shape help it adapt to it's specific job?
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Kidney shaped so can open and close the pores in a leaf
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What happens To the guard cell when there is a lot of water in the plant?
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The guard cell (full of water) goes turgid (hard) which makes the stomata (pore) open so gases can be exchanged for photosynthesis
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What happens to the guard cell when the plant is short of water?
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Guard cell becomes flaccid (soft) making the stomata (pores) close to stop water vapour escaping.
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How does the guard cell open and close?
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Thin outer walls and thickened inner walls help to open and close
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What happens to a guard cell at night?
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They are sensitive to light and close at night to save water loss when photosynthesis can't happen because of the lack of light.
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What jobs are the guard cells adapted to do/control?
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Allowing gas exchange in leaves of a plant and controlling water loss.
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What are red blood cells adapted to do?
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Carry oxygen
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They have a concave shape to do this
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What shape are red blood cells and how does this help them do there specific job?
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They have a concave shape to give them a big surface area to Cary oxygen and also helps them pass smoothly through capillaries.
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What is the role of haemoglobin?
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A pigment that absorbs oxygen in red blood cells, red blood cells are packed full of these
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Why do red blood cells have no nucleus?
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Leave more room for haemoglobin
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What is the main function of the egg cell?
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To carry the female DNA and nourish the embryo in the early stages, the egg cell contains a large food store for the embryo.
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What does the eggs membrane do as soon as a sperm cell fuses with the egg?
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Changes it's structure to stop more sperm getting in
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What is the function of the sperm?
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To get the male DNA to the egg
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How is the sperm adapted?
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Long tail and streamlined head to help it swim to the egg. Lots of mitochondria to give it the energy needed.
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Why are there lots of enzymes in the head of the sperm cells?
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To digest through the egg cells membrane
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