Question

Assertion :Prolactin is also called the Milk ejection hormone. Reason: Prolactin stimulates the smooth muscle contractions of the mammary glands.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is D Both Assertion and Reason are incorrect

It is not prolactin but oxytocin hormone also Known as milk ejection hormone' because the oxytocin induces contractions of the mammary gland muscles to help in the flow of stored milk from the mammary glands to the mouth of the suckling infant. Oxytocin contracts the smooth muscles of the uterus and mammary glands. Uterine contractions, stimulated by oxytocin at the end of pregnancy, help in the child-birth. That is why it is also called Birth hormone'. Paladin or lactogenic hormone or stenographic hormone (LTH) is secreted by the anterior pituitary which helps in the growth of mammary glands during pregnancy and initiates the secretion of milk after childbirth.

So the correct answer is 'Both Assertion and Reason are incorrect'.