This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
An action potential is initiated at the Axon Hillock or ­Initial segment of the neuron because 
Select and explain. 
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
A: Threshold for Excitation is lowest
Answer: A: Threshold for Excitation is lowest 
Explanation: None