Use the drop-down menus to complete the sentences. A synapse is the small between the dendrite of one neuron and the axon terminal of another, across which the neurotransmitter flows to propagate a signal. An action potential is a(n) sent by a neuron down its axon to stimulate the release of neurotransmitter by the axon terminal. An axon is the long extension that connects a neuron’s dendrite with its . An axon terminal is the part of a neuron that is opposite from the , which is responsible for sending signals to the neighboring neurons. Myelin is a protective coating that surrounds and insulates to enable them to transmit signals.