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Question

Choose the correct answer from the alternatives given.
Which of the following hormone induces contraction of uterine wall during child birth?

A
Somatotropic hormone
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B
Oxytocin
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C
Thyroxine
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D
Parathormone
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Solution

The correct option is B Oxytocin

(A) Somatotrophic hormone or Growth hormone is a peptide hormone that stimulates growth, cell reproduction etc.
(B) Oxytocin acts on the smooth muscles of our body and stimulates their contraction. In females, it stimulates a vigorous contraction of the uterus at the time of childbirth, and milk ejection from the mammary gland.
(C) Thyroxine is a hormone produced by the thyroid gland.
(D) Parathormone is a hormone released by the parathyroid gland. The secretion of PTH is regulated by the circulating levels of calcium ions.
So the correct answer is oxytocin.

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