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Neurotransmitters

  • Arran Lewis
  • Digital Images
  • Online

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Illustration showing the action of neurotransmitters such as serotonin and noradrenaline in the synaptic cleft. Vesicles containing the neurotransmitter (green) move towrds the pre-synaptic membrance where they fuse with the cell membrane, releasing their contents into the synaptic cleft. The neurotransmmitter molecules act on the post-synaptic cell by binding to specific receptors on the cell surface (purple). They can also be taken back up by the presynaptic cell via other receptors (orange) for re-use.

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