This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
[{'content': 'True about shunt vessels \nSelect and explain. \nA. Evenly distributed throughout the skin, B. Role in nutrition, C. Play a role in thermoregulation, D. No autonomic nervous regulation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Shunt vessels are sho, low resistance connection between aerioles and veins,allowing blood to bypass capillaries in ceain areas These vessels are especially found in skin of finger, toes, and earlobes where they play a major role in thermoregulation Ref: Medical Physiology Indu Khurana 2015 edition, Page No:237 Shunt vessels can control blood flow by constriction and dilatation . In endotherms the shunt vessels dialate in response to cold,this cause more heat to be carried by blood to the skin where it can be lost to the air and preventing heat loss through the skin once body temperature has returned to normal.', 'role': 'assistant'}]