Usually, Action Potentials in Neurons Begin at The

Question

Usually, action potentials in neurons begin at the
A) Axon hillock
B) First node of Ranvier
C) Largest dendrite
D) Soma
E) Smallest dendrite

Accepted Answer

Action potentials typically begin at the axon hillock, which is the area of the neuron where the cell body transitions to the axon. This region has a high concentration of voltage-gated sodium channels, making it highly sensitive to changes in membrane potential and thus the most likely site for the initiation of action potentials.