Question

Assertion :The hormone aldosterone increases the reabsorption of $N{a}^{+}$ by the nephron and the excretion of $K^{+}$. Reason: To maintain the pH of the blood and body fluids, the kidney secrete $H^{+}$ and $N{H}^{+}$

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

Aldosterone is the main mineralocorticoid produced by the adrenal cortex. It helps in reabsorption of Na+ and excretion of K+ and maintains the pH of urine. Ions like $H^{+}$, $N{H}^{+}$ are released into urine by nephron to maintain the pH of blood and body fluids. So both are statements are correct. But the given reason is not the correct explanation of assertion. So the correct option is B.