Which hormone causes strong contractions of the uterus at the time of childbirth and the ejection of milk from the mammary glands?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Oxytocin
Oxytocin, released from the posterior pituitary, makes smooth muscles contract: it causes the vigorous contraction of the uterus during childbirth and the ejection of milk. Prolactin controls the growth of the mammary glands and the formation of milk, not its ejection.