Biology

  • Created by: sabina098
  • Created on: 30-11-17 15:15
What is the cell membrane made up of?
Phospholipid bi-layer
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What is the phospholipid bi-layer?
It is the cell membrane which contains protein channels for ions and molecules to pass through
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What can't pass through the phospholipid bi-layer and why?
Large molecules such as glucose and ions, as they need specific transport proteins
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What is simple diffusion?
movement of small molecules or non-polar molecules from an area of high occnentration to a low concentration gradient eg carbon dioxide and oxygen
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What is fascillitated diffusion?
Charged molecules and large molecules require active transport for movement of this
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What is a co-transport?
Transports sodium and glucose indirectly and moves glucose against the concentration gradient. Some are unable to work without the sodium potassium pump
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What is osmosis?
Moevment of water molecules from a high water potential to a low water potential down the concentration gradient
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Other cards in this set

Card 2

Front

What is the phospholipid bi-layer?

Back

It is the cell membrane which contains protein channels for ions and molecules to pass through

Card 3

Front

What can't pass through the phospholipid bi-layer and why?

Back

Preview of the front of card 3

Card 4

Front

What is simple diffusion?

Back

Preview of the front of card 4

Card 5

Front

What is fascillitated diffusion?

Back

Preview of the front of card 5
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