This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
[{'content': 'Half-life of insulin receptor is \nSelect and explain. \nA. 3 hr, B. 7 hr, C. 12 hr, D. 24 hr', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The insulin receptor (IR) is a transmembrane receptor that is activated by insulin, IGF-I, IGF-II and belongs to the large class of tyrosine kinase receptors. Metabolically, the insulin receptor plays a key role in the regulation of glucose homeostasis, a functional process that under degenerate conditions may result in a range of clinical manifestations including diabetes and cancer. The half-life of insulin receptor is about 7 hrs.Ref: Ganong&;s review of medical physiology;24th edition; page no-437', 'role': 'assistant'}]