Renal Blood Flow & GFR — Renal Physiology

Renal Blood Flow & GFR MCQs: practice questions

Sample Renal Blood Flow & GFR multiple-choice questions from Renal Physiology.

1. An increase in Bowman's space hydrostatic pressure will:

   • A. Increase GFR
   • B. Decrease GFR
   • C. Increase RPF
   • D. Increase filtration fraction necessarily
   • E. Increase plasma oncotic pressure

2. Tubuloglomerular feedback involves sensing NaCl delivery near the:

   • A. Macula densa
   • B. Collecting duct
   • C. Glomerular basement membrane
   • D. Renal pelvis
   • E. Proximal tubule brush border only

3. An increase in glomerular capillary oncotic pressure will:

   • A. Increase filtration coefficient
   • B. Increase GFR
   • C. Increase RPF
   • D. Decrease plasma protein concentration
   • E. Decrease GFR

4. Constriction of the afferent arteriole causes:

   • A. Increased GFR and increased RPF
   • B. Decreased GFR and decreased RPF
   • C. Increased GFR with unchanged RPF
   • D. Decreased GFR with increased RPF
   • E. No change in either

5. Angiotensin II preferentially constricts the:

   • A. Peritubular venules only
   • B. Afferent arteriole
   • C. Efferent arteriole
   • D. Renal vein
   • E. Vasa recta only

6. The clearance of PAH is used to estimate:

7. Renal plasma flow is calculated from renal blood flow using:

8. Increased NaCl delivery to the macula densa generally causes:

9. PAH clearance is slightly less than true renal plasma flow because:

10. The myogenic mechanism responds to increased renal perfusion pressure by causing:

11. If a substance has a clearance less than inulin, the substance is undergoing net:

12. Severe efferent arteriolar constriction can decrease GFR because:

13. Renal blood flow is calculated from renal plasma flow and hematocrit as:

14. The main force favoring glomerular filtration is:

15. GFR is determined by the balance of:

16. Increased plasma protein concentration in glomerular capillaries causes:

17. Sympathetic stimulation of the kidney generally causes:

18. The filtration barrier normally prevents filtration of:

19. The filtration fraction is:

20. An increase in glomerular capillary hydrostatic pressure will:

21. A ureteral obstruction decreases GFR because it increases:

22. Renal Blood Flow & GFR 30 questions • Five related options • One best answer • Explanation 1. Renal blood flow is approximately:

23. If a substance has a clearance greater than inulin, the substance is undergoing net:

24. The clearance of inulin is used to measure:

25. If GFR is 125 mL/min and RPF is 625 mL/min, filtration fraction is:

26. A substance that is freely filtered but neither reabsorbed nor secreted has a clearance equal to:

27. Moderate constriction of the efferent arteriole causes:

28. A decrease in efferent arteriolar resistance tends to:

29. A decrease in afferent arteriolar resistance tends to:

30. Renal autoregulation helps keep: