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Solution


Q.

Which of the following pairs of hormones are not antagonistic (having opposite effects) to each other                   [2016]
1 Aldosterone – Atrial Natriuretic Factor  
2 Relaxin – Inhibin  
3 Parathormone – Calcitonin  
4 Insulin – Glucagon  

Ans.

(2)

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.