Specialised Cells

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What are palisade leaf cells adapted for?
Photosynthesis
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What do palisade leaf cells contain lots of?
Chloroplasts
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Where are most chloroplasts found in this cell?
At the top
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Why are most chloroplasts located in this place?
So that they're nearer to the light
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Why are palisade leaf cells tall?
This means that they have a large surface area exposed down the side for absorbing CO2 from the air in the leaf
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Why are palisade leaf cells thin?
So that lots of them can be packed at the top of the leaf
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What are guard cells adapted to do?
Open and close pores
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What are guard cells shaped like?
A kidney
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What do guard cells open and close in a leaf?
The stomata
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What happens to the guard cells when the plant has lots of water?
The guard cells fill with it and go plump and turgid
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When there is lots of water in the leaf, what do the stomata do?
They open
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Why do the stomata do this when there is lots of water in the leaf?
So that gases can be exchanged for photosynthesis
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What happens to the guard cells when the plant is short of water?
The guard cells lose water and become flaccid
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When there is little water in the leaf, what do the stomata do?
They close
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Why do the stomata do this when there is little water in the leaf?
This helps stop too much water vapour escaping
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What two properties do guard cells have that allow them to do the opening and closing work?
1. Thin outer walls 2. Thickened inner walls
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What other property do guard cells have that allow them to save water?
They are sensitive to light, so they close at night to save water without losing out on photosynthesis
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What do guard cells control in a leaf?
Gas exchange and water loss
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What shape do red blood cells have?
A concave shape
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What does this shape allow the cell to do easily?
It gives it a big surface area for absorbing oxygen. It also helps them to pass smoothly through capillaries to reach body cells
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What do red blood cells contain?
Haemoglobin
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What do red blood cells not contain?
A nucleus
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Why do red blood cells not contain this?
To leave even more room for haemoglobin
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Other cards in this set

Card 2

Front

What do palisade leaf cells contain lots of?

Back

Chloroplasts

Card 3

Front

Where are most chloroplasts found in this cell?

Back

Preview of the front of card 3

Card 4

Front

Why are most chloroplasts located in this place?

Back

Preview of the front of card 4

Card 5

Front

Why are palisade leaf cells tall?

Back

Preview of the front of card 5
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