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Each axon terminal contains thousands of membrane-bound sacs called vesicles, which in turn contain thousands of neurotransmitter molecules each. Neurotransmitters are chemical messengers which relay, amplify and modulate signals between neurons and other cells.
What is the function of relay neuron? A relay neuron is the neuron that picks up the message from the sensory neuron and delivers it to the motor neuron in the spinal cord then to the brain.he major function of a neuron is to transmit information from one body part to the next. + 5 others found this useful. Christina Poverelli Lovingood. Edit. Share to: 1  Action Potential In psychology, to understand how the brain works, it is essential to understand the building blocks on which the brain is constructed.