Allows movement of some substances - large ions and molecules like glucose. Also allows hydrophilic molecules to pass through. Look like gates.
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Carrier Proteins
Actively move some substances across membrane, usually ions like magnesium or nitrate.
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Cholesterol
Give mechanical stability. Slots between phospholipid bilayer to prevent water molecules and ions passing through.
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Glycoproteins
Important in cellsignalling - act as receptor sites against immune cells. Prevent immune system thinking the cell is foreign. Also bind cells together in tissues.
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Glycolipids
Act as hormone receptor sites. Used in self recognition and cell signalling.
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Phospholipid Bilayer
Phosphate head is hydrophilic and fatty acids are hydrophobic. Provide the main structure for membrane. Provides some stability and are permeable to water.
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Receptor Sites
Where transmitter molecules bind to, like hormones, they're specific to molecules. They affect cell metabolism by letting drugs bind to them.
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Enzymes/Coenzymes
If some reactions take place in the membranes, enzymes are bound to membranes. The more surface area the more enzymes, e.g. Cristae in Mitochondria or Thylakoids in Chloroplasts
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Other cards in this set
Card 2
Front
Actively move some substances across membrane, usually ions like magnesium or nitrate.
Back
Carrier Proteins
Card 3
Front
Give mechanical stability. Slots between phospholipid bilayer to prevent water molecules and ions passing through.
Back
Card 4
Front
Important in cellsignalling - act as receptor sites against immune cells. Prevent immune system thinking the cell is foreign. Also bind cells together in tissues.
Back
Card 5
Front
Act as hormone receptor sites. Used in self recognition and cell signalling.
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