The action potential of a neuron (a) is terminated by efflux of K* (b) is initiated by efflux of Na* (c) declines in amplitude as it moves along (c) the axon (d) results in a transient reversal of the concentration gradient
Answer is (D).
During the start Na+ channel opens & so Influx of Na+ takes place. So outside becomes negative and inside positive. During Renaturation time K+ channel opens up & ...