In the ascending limb of the loop of Henle the .
A)thick segment is permeable to water
B)thin segment is not permeable to sodium and chloride
C)thin segment is freely permeable to water
D)thick segment moves ions out into interstitial spaces for reabsorption

Question

Quizplus · Accepted Answer

The thick segment of the ascending limb actively moves ions (sodium, potassium, and chloride) out of the tubular fluid and into the interstitial spaces for reabsorption, creating a concentration gradient. This section is not permeable to water. The thin segment of the ascending limb is also not permeable to sodium and chloride. Both the thin and thick segments of the ascending limb play a crucial role in establishing a concentration gradient in the renal medulla, which is necessary for the production of concentrated urine.

In the Ascending Limb of the Loop of Henle the