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8 Cards in this Set
- Front
- Back
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List components of cell membrane |
Cholesterol Hydrophobic tail and hydrophylic head Phospholipids bilayer Internal and external proteins Channel proteins and carrier Glycoprotein |
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What is the function of cholesterol in cell membrane |
Gives the membrane stability. Cholesterol binds to hydrophobic tails of phospholipids which packs them closer together so restricting movement of phospholipids making cells less fluidhhg |
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What is active transport |
The movement of molecules or charged ions from a low concentration to a high concentration this process requires energy from ATP |
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What is osmosis |
The movement of water molecules from a high water potential to a low water potential across a partially permeable membrane |
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What happens to membrane at temperature below 0 |
As there are channel proteins within the membrane, these will denature which makes membrane more permeable |
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What happens to membrane between 0-45 degrees |
Phospholipids move around more as they have more energy which increases permeability of membrane |
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What happens to the membrae above 45 degrees celsius |
Phospholipids bilayer breaks down so more permeability. Water inside cell expands so puts more pressure on membrane. Channel proteins denature s |
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What is diffusion |
Net movement of particles from high concentration to low concentration |
