12. Melatonin is a hormone produced in the pineal gland. It can be used to treat symptoms of sleep disorders and seasonal
affective disorder because
(A) it decreases production of serotonin.
(B) it increases production of serotonin.
(C) it increases production of tryptophan.
(D) it activates the brainstem.
(E) its peak production is normally at night.
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不懂這題有什麼因果關係?為什麼要用bec...
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人在接近入睡時(21:00左右)便會開始...
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答 補充
