An action potential travels down the axon of the pre-synapticsendingcell and arrives at the axon terminal. Neurotransmitter is released into the synaptic cleft. Synapses Neurotransmitters And Action Potentials Physiology Ap Psychology Biochemistry When an action potential reaches the axon terminal it depolarizes the membrane and opens voltage-gated Na channels. . The correct sequence of chemical events at a synapse is. This spot of close connection between axon and dendrite is the synapse. The other neuron then translates the chemical signal back into an electrical one Step 3 4. View Available Hints Graded potential at postsynaptic membrane Diffusion of neurotransmitter into extracellular fluid separating two neurons membranes Synaptic vesicles fuse and exocytice neurotransmitter. Synthesis of the chemical message Neurotransmitter synthesis. Neurotransmission at a chemical synapse begins with the arrival of an action poten...
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