Packet 8: 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 (15[1])using caber·goline. (15[1])This hormone and somato·tropin (-5[1])are mimicked by hCS (15[1])in the placenta. Antipsychotics can cause the overproduction of this hormone (-5[1])by blocking the tubero·infundibular pathway from (15[1])releasing (*) dopamine. Should (10[1])one voluntary action occur, levels of this 23-kilodalton hormone decrease steadily and oscillate while estrogen and progesterone (-5[1])levels decrease (-5[1])rapidly (-5[1])after childbirth. (10[1]-5[2])This hormone (-5[1])and oxytocin stimulate the ejection of an Ig·A-rich (10[1])substance during (10[3])a (10[1])let-down (10[2])reflex, which is triggered by suckling. (10[2])For 10 points, (10[1])what hormone (10[2])stimulates the mammary glands (10[1])to produce (10[2])breast milk? ■END■ (10[5]0[9])

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