When the action potential reaches the axon terminal, it triggers the release of neurotransmitter by exocytosis. The influx of calcium ions (Ca²⁺) into the axon terminal is a key step that signals the synaptic vesicles containing neurotransmitters to fuse with the presynaptic membrane, leading to their release into the synaptic cleft.
3 With the normal extracellular calcium concentration, [Ca*], when the action potential reaches the axon terminal it triggers
• contraction of the axon terminal.
release of neurotransmitter by exocytosis.
a chemical reaction where Ca?* is converted to Mg?+.
no response.
1 answer