Given the following forces acting at a given point across the capillary wall, _______ will occur with a net ______ pressure of ____ mm Hg.
- capillary blood pressure = 32 mm Hg
- blood osmotic pressure = 23 mm Hg
- interstitial fluid hydrostatic pressure = 1 mm Hg
- interstitial fluid osmotic pressure = 0 mm Hg

Question

Quizplus · Accepted Answer

The net filtration pressure is calculated by subtracting the blood osmotic pressure and the interstitial fluid hydrostatic pressure from the capillary blood pressure. 
Net filtration pressure = capillary blood pressure - blood osmotic pressure - interstitial fluid hydrostatic pressure
Net filtration pressure = 32 - 23 - 1 = 8 mm Hg
Since the net filtration pressure is positive, this will lead to ultrafiltration (outward movement of fluid) with a net pressure of 8 mm Hg. Therefore, choice A is the correct answer.

Given the Following Forces Acting at a Given Point Across