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': 'Pancreas secretes all of the following except \nSelect and explain. \nA. Amino peptidase, B. Elastase, C. Ribonuclease, D. Colipase', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Elastase:\xa0Immediately\xa0on entering the small intestine from the stomach, the partial\xa0breakdown products of the protein foods are attacked by\xa0major\xa0proteolytic\xa0pancreatic\xa0enzymes:\xa0trypsin,chymotrypsin,\xa0 \xa0carboxypolypeptidase,\xa0and\xa0proelastase. Both\xa0trypsin and\xa0chymotrypsin\xa0split\xa0protein\xa0molecules into small polypeptides; carboxypolypeptidase then cleaves individual amino acids from the carboxyl ends of the polypeptides. Proelastase, in turn, is converted into elastase,\xa0which\xa0then\xa0digests\xa0elastin\xa0fibers\xa0 that\xa0partially hold meats together. Colipase and Ribonuclease are also secreted by Pancreas.', 'role': 'assistant'}]