This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
[{'content': 'Absolute refractory period is due to: \nSelect and explain. \nA. Opening of calcium channels, B. Opening of potassium channals, C. Closure of Active gates of sodium channals, D. Closure of inactive gates of sodium channals', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Inactivated gates of sodium are closed during depolarization and Remain closed until repolarization no action potential can occure untill inactivated sodium gate are opened Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:70', 'role': 'assistant'}]