in what order would a signal pass through a single neuron?

Answer 1

While the previous answers may be correct, they miss the point of the neuron. If all it does is pass a signal, then it's a nerve. The neuron takes signals or conditions from several inputs and fires or doesn't fire, based on its history and the history of its inputs. That's where the thinking happens. The nerve is just a wire to carry the result of the computation to where it is used.

Answer 2

From the dendrites/axon hillock then the axon and finally discharge the signal to the terminal boutons

Answer 3

A neurotransmitter travels from the axon to the dentrite. it leaves from the presynaptic membrane, crosses the synaptic gap, hits the postsynaptic membrane where it lodges itself in the receptor site of the dentrite.