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': 'Which of the following is not a renal vasoconstrictor? \nSelect and explain. \nA. Norepinephrine, B. Acetylcholine, C. Angiotensin II, D. None of the above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Norepinephrine (noradrenaline) constricts the renal vessels, with the greatest effect of injected norepinephrine being exeed on the interlobular aeries and the afferent aerioles. Dopamine is made in the kidney and causes renal vasodilation and natriuresis. Angiotensin II exes a constrictor effect on both the afferent and efferent aerioles. Prostaglandins increase blood flow in the renal coex and decrease blood flow in the renal medulla. Acetylcholine also produces renal vasodilation. A high-protein diet raises glomerular capillary pressure and increases renal blood flow. Ref: Ganong's Review of Medical Physiology 23rd edition, Chapter 38.", 'role': 'assistant'}]