A [a] is a small, localized change in membrane potential tha…
A is a small, localized change in membrane potential that occurs in response to a stimulus. If the change is positive and brings the neuron closer to threshold, it is called an , whereas a negative change that moves the neuron further from threshold is called an . Multiple signals can combine through , and if the threshold is reached, an is generated, allowing the neuron to send a signal down the axon.