Which of the following factors would decrease the GFR?
A) a fall in plasma protein concentration.
B) an obstruction such as a kidney stone in the tubular system, which increases Bowman's capsule hydrostatic pressure.
C) vasodilation of the afferent arterioles.
D) two of these answers.
E) all of these answers.

Question

Quizplus · Accepted Answer

An obstruction such as a kidney stone in the tubular system increases Bowman's capsule hydrostatic pressure, which reduces the net filtration pressure and thus decreases GFR.

Answer: D
 Both A (a fall in plasma protein concentration) and B (an obstruction) decrease GFR. A decrease in plasma protein concentration reduces the colloid osmotic pressure, which decreases the net filtration pressure and GFR.

Which of the Following Factors Would Decrease the GFR