Since the thin descending limb of the nephron loop is permeable to water,and not very permeable to solutes,the concentration of the filtrate will increase as it reaches the bottom of the loop.

Question

Quizplus · Accepted Answer

The thin descending limb of the nephron loop is permeable to water, but not very permeable to solutes. As a result, water is able to pass out of the filtrate and into the surrounding interstitial fluid, causing the concentration of solutes in the filtrate to increase as it moves down the loop. Therefore, option A is correct.

Since the Thin Descending Limb of the Nephron Loop Is