Cell membrane functions
- Created by: Daisy
- Created on: 22-03-15 22:40
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- Cell Membrane Functions
- Surround organelles inside cells
- Isolate reactions inside organelles from cytplasm
- Provide attachment sites for enzymes etc.
- E.g. inner membrane of a chloroplast contains chlorophyll needed for photosynthesis
- Partially-permeable
- Control what passes through them
- Small or uncharged particles can pass through phospholipids
- Protein channels and transport proteins control passage of large or charged particles
- Involved in cell signalling
- Substance produced by one cell docks into a receptor in the plasma membrane of another
- Receptors include glycoproteins and lipoproteins
- Electric signals can pass along them
- E.g. membrane of the axon of a motor-neurone transmits action potentials from the CNS to a muscle
- Surround organelles inside cells
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