21.下述那一種物質可抑制泌乳素(prolactin)的分泌?
(A)多巴胺(dopamine)
(B)促甲狀腺素釋放激素(thyrotropin-releasing hormone)
(C)甲狀腺素(thyroxine)
(D)生長激素(growth hormone)

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統計: A(140), B(3), C(2), D(1), E(0) #1028833