Cellular membrane

  • Created by: mishaKRY
  • Created on: 20-11-18 23:31
What is the cellular membrane?
- Semi-permeable allowing for movement - Barrier surrounding cell and organelles - The fluid mosaic model proposes a structure where the lipid bilayer with protein allow a high degree of movement to the membrane
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What is the function of the cellular membrane?
to protect cell from surroundings - Control movement of substances in and out of the cells and organelles
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What is the role of fats and lipids in the cellular membrane?
- Phospholipid forms a semipermeable bilayer (main component of membrane) - Molecules that dissolve in fat can pass but other molecules cannot - Sterols such as cholesterol, maintain membrane integrity regarding temperature changes
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Affect of temperature on cellular membrane?
- Increased temperature: cholesterol attracts phospholipids preventing expansion - Decreased temperature: cholesterol prevents over packing (rigid structure)
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Name 3 types of protein?
Channel protein, integral protein and peripheral protein
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What is the role of proteins in the cellular membrane?
- Transport substrates through channels - Enzymes as they speed up the rate of reaction - Receptors regarding cell messaging and hormones - Structural integrity of membrane as protein receptors attach to protein strands in extracellular fluid
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What is the role of proteins in the cellular membrane?
- Glycolipids attach to fats and glycoproteins attach to protein (extracellular fluid) - Identifies cell with cell name tags or antigens
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Card 2

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What is the function of the cellular membrane?

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to protect cell from surroundings - Control movement of substances in and out of the cells and organelles

Card 3

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What is the role of fats and lipids in the cellular membrane?

Back

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Card 4

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Affect of temperature on cellular membrane?

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Card 5

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Name 3 types of protein?

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