The portion of the nephron tubule that is not permeable to water is the
A) proximal convoluted tubule
B) descending limb of the nephron loop
C) ascending limb of the nephron loop
D) distal convoluted tubule
E) collecting duct

Question

Quizplus · Accepted Answer

The ascending limb of the nephron loop is the portion that is not permeable to water. In this section, sodium and other solutes are actively transported out of the tubule, but water cannot follow due to the impermeable nature of the cells in this region.

The Portion of the Nephron Tubule That Is Not Permeable