Effective net filtration pressure in the glomerulus in kidney of man is aboutA. +75 mm HgB. +80 mm HgC. +20 to 25 mm HgD. +50 mm Hg

The effective net filtration pressure (NFP) in the glomerulus of the kidney is calculated by taking into account various pressures within the glomerulus and its surroundings. The formula for calculating NFP is:

NFP = Glomerular hydrostatic pressure (PGC) - Bowman's capsule pressure (PBC) - Colloid osmotic pressure (πGC)

In a healthy human, the typical values for these pressures are approximately as follows:

Glomerular hydrostatic pressure (PGC): About +55 mm Hg
Bowman's capsule pressure (PBC): Approximately 0 mm Hg (negligible)
Colloid osmotic pressure (πGC): About -30 mm Hg (due to proteins in the blood)
Now, let's calculate NFP:

NFP = 55 mm Hg - 0 mm Hg - (-30 mm Hg) = 55 mm Hg + 30 mm Hg = 85 mm Hg

So, the effective net filtration pressure in the glomerulus of the kidney in a healthy individual is approximately +85 mm Hg. None of the options A, B, C, or D match this value. However, based on the given options, the closest choice is option B (+80 mm Hg), although it's still not exactly correct.