Question

(A) : Aldosterone is a steroid hormone and is important in the control of sodium and potassium ion concentration in mammals.
(B) : It upgrades sodium ion concentration in the ECF by promoting reabsorption of sodium ions from renal tubules and excretion of potassium ions in urine.

• A. Both (A) and (B) are false.
• B. (A) and (B) are true but (B) is not the correct explanation of (A).
• C. (A) is true but (B) is false.
• D. (A) and (B) are true and (B) is the correct explanation of (A).

Answer 1

The correct option is D (A) and (B) are true and (B) is the correct explanation of (A).

Aldosterone is one of the important mineralocorticoids in humans secreted by the adrenal cortex. Its main function is to regulate the sodium content of the body . It increases sodium ion concentration in the blood by absorbing sodium ions from renal tubules and excreting excess potassium ions into urine. Excessive production of aldosterone causes a disease called aldosteronism. Its symptoms include high blood pressure, high blood volume.