Which of the following pairs of hormones are not antagonistic (having opposite effects) to each other?
Correct answer: B. Relaxin: Inhibin
- A. Aldosterone: Atrial Natriuretic Factor
- B. Relaxin: Inhibin
- C. Parathormone: Calcitonin
- D. Insulin: Glucagon
Explanation
Relaxin hormone is secreted by ovary and placenta during pregnancy, which relaxes ligaments in pelvis and softens and widens cervix during childbirth. Inhibin secreted by granulosa cells in the ovaries inhibits secretion of FSH by anterior pituitary. Thus, relaxin and inhibin have different functions and are not antagonistic.
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About Chemical Coordination and Hormones
Chemical coordination uses hormones released by endocrine glands and carried in blood to specific target cells. Coverage includes the pituitary, thyroid, pancreas, adrenal glands, ovaries and testes, feedback control, and the contrast between slower, longer-lasting hormonal responses and rapid nervous coordination.
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