Question

Choose the odd one out from given option.

• A. Renin
• B. ANF
• C. ADH
• D. Aldosterone

Answer 1

The correct option is A Renin

A. Renin is an aspartic protease protein as well as an enzyme which is secreted by the kidneys in the Renin-angiotensin-aldosterone system that regulates the arterial blood pressure.

B. ANF is called the Atrial natriuretic factor, it is a polypeptide hormone (28 amino-acid) is secreted by the atria of the heart in response and acts on the kidney to increase sodium excretion and to inhibit renin secretion.

C. ADH is called Anti-diuretic hormone or vasopressin which produced by the hypothalamus and it regulates and balances the amount of water in the blood.

D. Aldosterone is a mineralocorticoid steroid hormone produced by the adrenal gland which helps in the conservation of sodium in the kidney, salivary glands, sweat glands and colon.

Except for Renin, all others are hormones.

• So, the correct answer is 'Renin'.