An electrical nerve impulse travels along the axon of the pre-synaptic neuron until it reaches the dendrite at the end., The dendrite contains vesicles of chemical messengers called neurotransmitters., The impulse causes the release of these neurotransmitters into the synapse., The neurotransmitters diffuse across the synapse., Receptors on the post-synaptic cell membrane have a specific shape to bind with the neurotransmitter., The binding of neurotransmitter to the receptors stimulates the second neuron to transmit an electrical impulse along its axon..

CAX A2 basic structure Synapses

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