Measurement of the functions of a nephron reveals a glomerular capillary pressure of 69 mm Hg, and a pressure in the capsular space of 15 mm Hg. Assuming that the blood colloid osmotic pressure is 30 mm Hg, and that essentially no plasma proteins are filtered by the glomerulus, what is the net filtration pressure in this case?
A) 30 mm Hg
B) 24 mm Hg
C) 69 mm Hg
D) 84 mm Hg
E) 99 mm Hg

Question

Quizplus · Accepted Answer

Net filtration pressure is calculated by subtracting the glomerular capillary pressure from the sum of the blood colloid osmotic pressure and the pressure in the capsular space. 
Net filtration pressure = (69 mm Hg) - (30 mm Hg + 15 mm Hg) = 24 mm Hg. Therefore, choice B is the correct answer.

Measurement of the Functions of a Nephron Reveals a Glomerular