What segment of the nephron is NOT permeable to H₂O even in the presence of vasopressin?
A) proximal tubule
B) ascending limb of the loop of Henle
C) descending limb of the loop of Henle
D) distal tubule

Question

Quizplus · Accepted Answer

The ascending limb of the loop of Henle is not permeable to water, even in the presence of vasopressin (antidiuretic hormone). This segment actively transports ions but remains impermeable to water, which helps in the concentration of urine.

What Segment of the Nephron Is NOT Permeable to H₂O