Final answer:
Oxytocin and breastfeeding involve a positive-feedback loop where the release of milk stimulates the secretion of more oxytocin, leading to the production of more milk.
Step-by-step explanation:
True. In the case of oxytocin and breastfeeding, it acts in a positive-feedback loop. When a baby suckles on the mother's nipple, it stimulates nerve impulses that reach the hypothalamus, which then signals the pituitary gland to secrete oxytocin. Oxytocin travels in the blood to the mammary glands and stimulates them to produce milk. The release of milk causes the baby to continue suckling, which leads to the secretion of more oxytocin and the production of more milk. This positive-feedback loop continues until the baby stops suckling at the breast.