Cell Membranes

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Plasma Membrane
Separates the cells contents from its external enviroment and controls the passage of materials between the cell and its external enviroment.
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Membranes are partially permeable
Allows small or uncharged particles to pass through it. Channel and Transport Proteins allow larger, charged particles through.
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Compartmentalisation
Most organelles are surrounded by a membrane, which isolates the reactions taking place inside the cell. Example: Some mitochondria have two layers.
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Cell Signalling
Substances can dock into a receptorin the membrane causing something to happen.
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Allows electrical signals through
Membranes of the nerve cells can transmit action potentials within the nervous system.
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Attachment for enzymes
Example: Inner membranes of mitochondria have attached to them enzymes required for ATP production.
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Card 2

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Allows small or uncharged particles to pass through it. Channel and Transport Proteins allow larger, charged particles through.

Back

Membranes are partially permeable

Card 3

Front

Most organelles are surrounded by a membrane, which isolates the reactions taking place inside the cell. Example: Some mitochondria have two layers.

Back

Preview of the back of card 3

Card 4

Front

Substances can dock into a receptorin the membrane causing something to happen.

Back

Preview of the back of card 4

Card 5

Front

Membranes of the nerve cells can transmit action potentials within the nervous system.

Back

Preview of the back of card 5
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