Q: What is the hormone responsible for the release of milk from the mammary gland?  

Answer: D

Oxytocin is a hormone produced by the hypothalamus and released by the posterior pituitary gland. It plays a crucial role in childbirth and lactation by stimulating the contraction of the uterus and the release of milk from the mammary gland. When a baby suckles at the breast, it triggers nerve impulses that travel to the hypothalamus, which then signals the pituitary gland to release oxytocin. The oxytocin causes the muscles around the milk glands to contract, pushing the milk down the ducts and out of the nipple. This process is known as the let-down reflex.

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