Question

Which of the following pairs of hormones are not antagonistic (having opposite effects) to each other?

• A. Parathormone - Calcitonin
• B. Insulin - Glucagon
• C. Aldosterone - Atrial natriuretic factor
• D. Relaxin - Inhibin

Answer 1

The correct option is D Relaxin - Inhibin

Relaxin is a hormone secreted by the ovaries and causes the ligaments of the pelvic girdles to relax, at the time of birth. Whereas, inhibin is secreted by the gonads (by Sertoli cells in the male and the granulosa cells in the female) and it inhibits the production of follicle-stimulating hormone (FSH) by the pituitary gland.
Parathormone and Calcitonin are antagonistic hormones secreted by the thyroid gland and are involved in regulating the levels of calcium and phosphate in the blood.
Insulin and Glucagon are antagonistic hormones of the pancreas that play a role in the regulation of sugar levels in the blood.
Atrial natriuretic factor is a powerful vasodilatation secreted by the muscle cells of the heart and act to reduce the water, sodium, and adipose loads on the circulatory system, thereby reducing blood pressure. ANF has exactly the opposite function of the aldosterone secreted by the adrenal glands.