Question

If the osmotic pressure in the glomerular capillaries increased from 28 mmHg to 35 mmHg due to dehydration, would net filtration increase or decrease?

A. Net filtration would increase.
B. Net filtration would decrease.
C. Net filtration would not be altered.

Answer 1

If the osmotic pressure in the glomerular capillaries increased from 28 mmHg to 35 mmHg due to dehydration, net filtration would decrease. The increase in osmotic pressure would oppose the filtration process, resulting in less fluid and solutes being filtered out of the glomerular capillaries and into Bowman's space.

Step-by-step explanation:

If the osmotic pressure in the glomerular capillaries increased from 28 mmHg to 35 mmHg due to dehydration, net filtration would decrease. Net filtration is determined by the difference between the hydrostatic pressure and the colloid osmotic pressure. In this case, the increase in osmotic pressure would oppose the filtration process, resulting in a decrease in net filtration. This means less fluid and solutes would be filtered out of the glomerular capillaries and into Bowman's space.

Answer 2

Net filtration would decrease.

Step-by-step explanation:

Net filtration pressure may be defined as the pressure present at the glomerulus. The net filtration pressure is the outward pressure minus the inward pressure existing at the kidney.

The net filtration pressure is affected by the osmotic pressure as well. The osmotic pressure always opposed the filtration. This might result in the increase in osmotic pressure. This will ultimately decrease the net filtration pressure as both oppose each other.

Thus, the correct answer is option (b).