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': 'All of the following are true about excitation-contraction coupling in skeletal muscle except that \nSelect and explain. \nA. Acetylcholine is released at the nerve terminal, B. Ca2+ is released from sarcoplasmic reticulum during contraction, C. Ca2+ is pumped back into sarcoplasmic reticulum during relaxation, D. Ca2+ binds to tropomyosin to initiate muscle contraction', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ca2+ binds to troponin C (not Tropomyosin) to initiate muscle contraction. Ref: Ganong&;s Review of Medical Physiology 26th edition Pgno: 105', 'role': 'assistant'}]