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The many Parts of the Cell Membrane


Protein Channels & Carrier Proteins

A watery pathway through the interstices of a protein molecule by
which ions and small molecules can cross a membrane into or out of a
cell by diffusion. A channel protein can act as just a tunnel for…

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Cell Surface Receptors

Cell surface receptors are specialized integral membrane proteins that take part in communication
between the cell and the outside world. Extracellular signalling molecules (usually hormones,
neurotransmitters, growth factors or cell recognition molecules) attach to the receptor, triggering
changes in the function of the cell. The binding initiates…

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