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?
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