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': 'Calcium is stored in \nSelect and explain. \nA. T tubule, B. Sarcoplasmic reticulum, C. Terminal cistern, D. Golgi apparatus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Calcium is stored in sarcoplasmic reticulum in the skeletal and cardiac muscles Calcium plays a major role in muscle contraction Ref:Guyton and Hall textbook of medical physiology 12th edition,page number: 85 ,86,87', 'role': 'assistant'}]