The descending limb of the nephron loop .
A) is freely permeable to sodium and urea
B) contains fluid that becomes more concentrated as it moves down into the medulla
C) pulls water by osmosis into the lumen of the tubule
D) is not permeable to water

Question

Quizplus · Accepted Answer

The descending limb of the nephron loop is permeable to water but not to solutes, causing the fluid to become more concentrated as water is reabsorbed into the surrounding medulla.

The Descending Limb of the Nephron Loop