Affect of sympathetic stimulation on GFR ?: (A) 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
Answer is C. 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.