Filtrate in which part of the nephron tubule has the highest osmolality?
A)Proximal tubule
B)Ascending nephron loop
C)Descending nephron loop
D)Distal tubule

Question

Quizplus · Accepted Answer

The descending limb of the nephron loop has the highest osmolality due to the active reabsorption of water from the filtrate. As the filtrate descends, it encounters increasing concentrations of salt in the external renal medulla, which creates an osmotic gradient that draws water out of the nephron and into the surrounding interstitial fluid. This allows the body to conserve water and produce concentrated urine.

Filtrate in Which Part of the Nephron Tubule Has the Highest