Neurotransmitter

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A neurotransmitter (see list of neurotransmitters) is a chemical that is released at the synapse of an electically stimulated neuron that then modulates the function of the cell on the other side of the synapse. Typically a neurotransmitter acting on the second cell could:

  • stimulate electrical membrane depolarisation causing say an action potential or muscle cell contraction
  • inhibit electrical membrane depolarisation
  • stimulate a secondary message cascade activating membrane ion channels, membrane pumps, kinases, or proteases
  • inhibit a secondary message cascade blocking membrane ion channels, membrane pumps, kinases, or proteases