Which of the following forces oppose glomerular filtration?
A) blood colloid osmotic pressure
B) Bowman's capsule hydrostatic pressure
C) glomerular-capillary blood pressure
D) blood colloid osmotic pressure and Bowman's capsule hydrostatic pressure
E) Bowman's capsule hydrostatic pressure and glomerular-capillary blood pressure

Question

Quizplus · Accepted Answer

Glomerular filtration is opposed by two forces: blood colloid osmotic pressure (due to the presence of proteins in the blood that tend to hold onto water) and Bowman's capsule hydrostatic pressure (due to the pressure exerted by the fluid already present in the capsule). Therefore, the best choice is D, which includes both of these opposing forces. Option A (blood colloid osmotic pressure only) is incorrect since it does not account for the opposing force of Bowman's capsule hydrostatic pressure. Option B (Bowman's capsule hydrostatic pressure only) is incorrect for the same reason. Option C (glomerular-capillary blood pressure only) is incorrect as this is the driving force behind glomerular filtration, and not an opposing force. Finally, option E (Bowman's capsule hydrostatic pressure and glomerular-capillary blood pressure) is incorrect as it does not account for the opposing force of blood colloid osmotic pressure.

Which of the Following Forces Oppose Glomerular Filtration