Physiology Action potential is initiated at the Axon Hillock – Initial segment of the neuron because A Threshold for excitation is lowest B Neurotransmitter is released at this site C It is an unmyelinated segment D Has lowest concentration of voltage gated sodium channels 💡 Explanation Action potential is initiated at the Axon Hillock - Initial segment of the neuron because ✓ Correct Answer: A. Threshold for excitation is lowest