Action potentials are initiated at the axon hillock region because it has the lowest threshold voltage.

Question

Quizplus · Accepted Answer

The axon hillock region of a neuron has the lowest threshold voltage, meaning that it requires the least amount of depolarization to initiate an action potential. This is due to the large concentration of voltage-gated sodium channels in this region, which quickly open in response to the depolarizing current and generate an action potential that propagates down the axon. Thus, the axon hillock is considered the trigger zone for action potential generation in neurons.

Action Potentials Are Initiated at the Axon Hillock Region Because