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
[{'content': 'Erythropoietin is secreted from: \nSelect and explain. \nA. Juxtaglomerular cells, B. Macula densa, C. Interstitial cells, D. Glomerulus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In\xa0adults,\xa0about\xa0 85%\xa0of\xa0the\xa0erythropoietin\xa0comes\xa0from\xa0the\xa0kidneys\xa0and\xa015% from the liver.\xa0\nErythropoietin\xa0is\xa0produced\xa0by\xa0interstitial\xa0cells\xa0in the\xa0peritubular\xa0capillary bed\xa0of\xa0the\xa0kidneys\xa0and\xa0by\xa0perivenous hepatocytes in the liver.', 'role': 'assistant'}]