This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
[{'content': 'Na+ channel concentration is highest at \nSelect and explain. \nA. Dendrites, B. Soma, C. Axon hillock, D. Axon', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Axon hillock has greatest in a sodium plus channel concentration Ref : guyton and hall textbook of medical physiology 12 edition page number:66,67,68', 'role': 'assistant'}]