Question

Which one among the following is permeable for ascending loop of Henle?

• A. Ammonia
• B. Glucose
• C. Na${}^{+}$
• D. Water

Answer 1

Answer: (C)

Na${}^{+}$

Henle's loop and Distal convoluted tubule( DCT). The descending loop of Henle is permeable to water and impermeable to Na+ and the ascending loop of Henle is impermeable to water and permeable to Na+ ion. Therefore, as the concentrated filtrate pass upward, it gets diluted due to the passage of electrolytes to the medullary fluid.

So, the correct answer is 'Na+.