Question

Which segment of renal tubule is permeable to water but nearly impermeable to salts?

• A. Descending limb of Henle's loop
• B. Proximal convoluted tubule
• C. Ascending limb of Henle's loop
• D. Distal convoluted tubule

Answer 1

The correct option is A Descending limb of Henle's loop

Descending limb is the first part of the loop of Henle. It helps to maintain the concentration of urine. It is highly permeable to water thus water is readily reabsorbed from the descending limb by osmosis. It is impermeable to sodium and chloride ions. Thus, the correct answer is option A.