Given the following forces acting at a given point across the capillary wall, what type of fluid movement will be taking place at that point? capillary blood pressure = 32 mmHg
Plasma-colloid osmotic pressure = 23 mmHg
Interstitial fluid hydrostatic pressure = 1 mmHg
Interstitial fluid-colloid osmotic pressure = 0 mmHg

Question

Quizplus · Accepted Answer

Ultrafiltration will occur when the capillary blood pressure (outward pressure) is greater than the plasma-colloid osmotic pressure (inward pressure). 
In this case: 
Capillary blood pressure = 32 mmHg (outward pressure)
Plasma-colloid osmotic pressure = 23 mmHg (inward pressure)
Interstitial fluid hydrostatic pressure = 1 mmHg (outward pressure)
Interstitial fluid-colloid osmotic pressure = 0 mmHg (inward pressure)
Net outward pressure = (capillary blood pressure + interstitial fluid hydrostatic pressure) - (plasma-colloid osmotic pressure + interstitial fluid-colloid osmotic pressure) 
= (32 mmHg + 1 mmHg) - (23 mmHg + 0 mmHg) 
= 10 mmHg 
Therefore, ultrafiltration will occur with a net outward pressure of 10 mmHg.

Given the Following Forces Acting at a Given Point Across