Question

What among the following values represent the net effective filtration pressure?

• A. 60 mmHg
• B. 18 mmHg
• C. 32 mmHg
• D. 10 mmHg

Answer 1

The correct option is D 10 mmHg

Net effective filtration pressure is the interaction between the forces that promote and oppose filtration.
Factor that promotes filtration:
Glomerular Hydrostatic Pressure (GHP) -
It is the pressure created in the capillaries due to difference in the diameters of afferent and efferent arterioles and the capillaries.
GHP = 60 mmHg
Factors that oppose filtration:
a) Capsular Hydrostatic Pressure (CHP)
It is the pressure that is created by the fluid already present in the Bowman’s capsule.
CHP = 18 mmHg
b) Blood Colloid Osmotic Pressure (BCOP)
It is the pressure created by plasma protein in the blood.
BCOP = 32 mmHg
Thus the Net Effective Filtration Pressure (NFP) can be calculated as follows:
NFP = GHP - (CHP + BCOP)
NFP = 60 - (32 + 18)
NFP = 10 mmHg