Round 7: Tossup 21

This hormone can aggregate with Ig·G to form a “big big” variant that exhibits minimal biological activity. Hypersecretion of this hormone in individuals with the most prevalent form of macro·adenoma is often corrected using caber·goline. (15[1])This hormone and somato·tropin are mimicked by hCS in the placenta. Antipsychotics can cause the overproduction of this hormone by blocking the tubero·infundibular pathway from releasing (*) dopamine. Should one voluntary action occur, levels of this 23-kilodalton hormone decrease steadily and oscillate while estrogen and progesterone levels decrease rapidly after childbirth. This hormone and oxytocin stimulate the ejection of an Ig·A-rich (10[1])substance during a let-down reflex, which is triggered by suckling. (10[1])For 10 points, what hormone (10[1])stimulates the mammary glands to produce breast milk? ■END■

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