Final answer:
Communication between neurons is a chemical change involving neurotransmitters, where neurotransmitters like dopamine are released and bind to receptors on the post-synaptic neuron, causing excitatory or inhibitory effects.
Step-by-step explanation:
The communication between neurons is referred to as an electrochemical event. The electrical part involves the movement of an action potential down the neuron's axon, while the chemical change is represented by the movement of neurotransmitters across the synaptic gap between neurons. Most synapses in the human nervous system are chemical in nature, where neurotransmitters like dopamine (C8H11NO2), are released from the presynaptic neuron into the synaptic cleft and bind to receptors on the postsynaptic neuron. This binding causes changes that can either excite or inhibit the postsynaptic neuron. Some synapses are electrical, but these are less common; they are characterized by direct electrical communication via gap junctions between neurons, allowing ions to pass directly from one cell to another.