An electrical impulse arrives at the presynaptic neuron ending., This causes vesicles containing neurotransmitter to move towards the cell membrane., Vesicles then empty the neurotransmitter into the synaptic cleft., Neurotransmitter molecules then diffuse across the synaptic cleft to the area of low concentration to the postsynaptic cell membrane., The neurotransmitter molecules bind to the receptors on the post synaptic neuron..

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