Final answer:
An axon is a tube-like structure that propagates the signal from the cell body to specialized endings called axon terminals. When the action potential reaches the axon terminal, this causes the release of neurotransmitter onto the dendrite of another neuron.
Step-by-step explanation:
An axon is a tube-like structure that propagates the signal from the cell body to specialized endings called axon terminals. These terminals in turn then synapse with other neurons, muscle, or target organs. When the action potential reaches the axon terminal, this causes the release of neurotransmitter onto the dendrite of another neuron.