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': 'In extreme cold, which is not a mechanism of thermogenesis \nSelect and explain. \nA. Shivering, B. Increased secretion of epinephrine, C. Increased thyroxine, D. Piloerection', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Piloerection- the standing up of hairs on the skin to increase thermal insulation.Ref: Ganong&;s review of medical physiology; 24th edition', 'role': 'assistant'}]