How do neurons communicate? Place in order the sequence of events that occurs when a neuron fires. Start by clicking the first item in the sequence or dragging it here The presynaptic neuron receives excitatory input, moving it closer to producing an action potential. The neurotransmitters released have either excitatory or inhibitory effects on the postsynaptic neuron. The action potential excites the terminal buttons to release their chemicals into the synaptic cleft. An action potential is initiated and travels through the cell and down the axon.