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': 'During shock which organ is spared from vasoconstriction? \nSelect and explain. \nA. Skin, B. Hea, C. Kidney, D. Liver', 'role': 'user'}, {'content': "Answer: B \nExplanation: During shock vasoconstriction is generalized, sparing only the vessels of the brain and hea.A widespread reflex venoconstriction also helps maintain the filling pressure of the heaIn the kidneys, both afferent and efferent aerioles are constrictedRef: Ganong's Review of Medical Physiology Twenty-Third Edition Page No:516", 'role': 'assistant'}]