Cell Membranes 2.0 / 5 based on 1 rating ? BiologyCellular processes and structureASOther Created by: Nicole StrandCreated on: 23-04-13 17:38 Plasma Membrane Separates the cells contents from its external enviroment and controls the passage of materials between the cell and its external enviroment. 1 of 6 Membranes are partially permeable Allows small or uncharged particles to pass through it. Channel and Transport Proteins allow larger, charged particles through. 2 of 6 Compartmentalisation Most organelles are surrounded by a membrane, which isolates the reactions taking place inside the cell. Example: Some mitochondria have two layers. 3 of 6 Cell Signalling Substances can dock into a receptorin the membrane causing something to happen. 4 of 6 Allows electrical signals through Membranes of the nerve cells can transmit action potentials within the nervous system. 5 of 6 Attachment for enzymes Example: Inner membranes of mitochondria have attached to them enzymes required for ATP production. 6 of 6
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