Nerve impulses are transmitted from the end of one axon to the beginning of the next by the release of neurotransmitters. These are chemicals that cause a modest change in the potential across any nearby axon membrane, including that of the signaling nerve. Consider the features of the action potential. The neurotransmitters released by the signaling nerve do not trigger a return action potential that would run back along the same axon from which the signal came. In light of this observation, how much of a change in potential can these neurotransmitters induce, and for how long