Physiology What would tend to decrease GFR by more than 10% in a normal kidney? A Decrease in renal aerial pressure from 100 to 85 mm Hg B 50% decrease in afferent aeriolar resistance C 50% decrease in efferent aeriolar resistance D 50% increase in the glomerular capillary filtration coefficient 💡 Explanation What would tend to decrease GFR by more than 10% in a normal kidney? ✓ Correct Answer: C. 50% decrease in efferent aeriolar resistance