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  4. Assertion: Oxytocin is called 'milk-ejection hormone'. Reason: Oxytocin acts on the smooth muscles of uterus and stimulates its contraction.

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Q. Assertion : Oxytocin is called 'milk-ejection hormone'.
Reason : Oxytocin acts on the smooth muscles of uterus and stimulates its contraction.

Chemical Coordination and Integration

Solution:

Oxytocin acts on the smooth muscles of our body and stimulates their contraction. In females, it stimulates a vigorous contraction of uterus at the time of child birth, and milk ejection from the mammary gland during suckling.