If the osmotic pressure in the glomerular capillaries increased from 28 mmhg to 35 mmhg due to dehydration, in this case, the net filtration would decrease.
Urine is formed in the nephrons basically in two stages: glomerular filtration and renal reabsorption. It is in the glomerular capsule that occurs through extra glomerular filtration, which consists of bleeding from the blood plasma part of the renal glomerulus into the glomerular capsule. The extravasated liquid is called filtration.
In this case, we can see that the net filtration would decrease because the glomerular capillaries increased from 28 mmhg to 35 mmhg due to dehydration.
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