Question

Read the following statements and choose the correct option
I. Ascending limb of Henles loop is permeable to water
II. Tubular cells secrete substance like $H^{+},K^{+}$ and ammonia into filtrate
III. There is maximum reabsorption in Henles loop
IV. Conditional reabsorption of $N{a}^{+}$ occurs in DCT.
V. PCT helps in maintaining ionic balance of body fluids.

• A. I, IV, and V alone are correct
• B. II, III and V alone are correct
• C. III, IV and V alone are correct
• D. II, IV and V alone are correct
• E. I, II and III alone are correct

Answer 1

The correct option is D II, IV and V alone are correct

A) The statement I is wrong as the ascending limb of Henle's loops is impervious to water. Statement IV is correct as Conditional reabsorption of $N{a}^{+}$ occurs in DCT. Statement V is correct as PCT reabsorbs ions and helps in maintaining ionic balance of body fluids.

B) Statement II is correct as tubular cells in the DCT secrete substance like $H^{+}$, $K^{+}$ and ammonia into filtrate. Statement V is correct. Statement III is wrong as maximum reabsorption takes place in Bowman's capsule.

C) Statements IV and V are correct while statement III is wrong.

D) Statements II, IV and V are correct.
E) Statements I and III are wrong while II is correct.

So the correct answer is 'II, IV and V alone are correct'.