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Ramirez 1 Alma Ramirez Professor Stewart Physiology 1 23 June 2019 Axon Terminal Once the action potential arrives at the axon terminal it causes voltage-gated calcium channels to open up. Once the channels open it will then lead calcium ions and flood into the terminal end of axon. The calcium ions then binds to neurotransmitter vesicles and the vesicles then move to the presynaptic membrane. They vesicles then merge into the presynaptic membrane through the exocytosis process. Once the presynaptic membrane opens on an end the neurotransmitter are releases and secretes into the synaptic cleft. The synaptic cleft is the space between the presynaptic neuron and the postsynaptic membrane/neuron. Soon as the neurotransmitter are secreted, they will diffuse across the synaptic cleft and
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  • Spring '17
  • Lord, WA
  • axon terminal, calcium ions, neurotransmitter vesicles

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