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': 'Affect of sympathetic stimulation on GFR ? \nSelect and explain. \nA. Increased GFR with afferent aeriolar dilatation, B. Increased GFR with efferent aeriolar constriction, C. Decreased GFR with afferent aeriolar constriction, D. Decreased GFR with efferent aeriolar dilatation', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Decreased GFR with afferent aeriolar constrictionSympathetic stimulation causes afferent aeriolar constriction with decrease in RBF and GFR.Effect of sympathetic discharge on the renal regulation of body fluid and electrolytesSympathetic discharge on the kidney results in :-Decreased GRF.Increased reabsorption of Na+ and water from the PCT.Increased reabsorption of Na+ and water from the DCT.Thirst (due to angiotensin II production).The overall effect is fluid and electrolyte retention due to :-Decreased urinary output.Decreased urinary Na' excretion.Increased water intake.", 'role': 'assistant'}]