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有關下視丘在內分泌系統功能的敘述,下列何者正確?單選題(1 分) A.下視丘製造多種釋素(Releasing hormones),刺激腦垂體後葉釋放相關的促素(Tropic hormone) B.下視丘可經血液傳導,刺激腦垂體後葉製造精胺酸升壓素(Arginine vasopressin) C.下視丘製造釋素(Releasing hormone)的功能,可受到相關體抑制素的抑制 D.除了釋素(Releasing hormone)外,腦下垂體亦分泌激素抑制因子(Release-inhibiting hormone)

Question

有關下視丘在內分泌系統功能的敘述,下列何者正確?單選題(1 分) A.下視丘製造多種釋素(Releasing hormones),刺激腦垂體後葉釋放相關的促素(Tropic hormone) B.下視丘可經血液傳導,刺激腦垂體後葉製造精胺酸升壓素(Arginine vasopressin) C.下視丘製造釋素(Releasing hormone)的功能,可受到相關體抑制素的抑制 D.除了釋素(Releasing hormone)外,腦下垂體亦分泌激素抑制因子(Release-inhibiting hormone)

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Solution

C.下視丘製造釋素(Releasing hormone)的功能,可受到相關體抑制素的抑制。下視丘製造的釋素可以刺激腦垂體前葉製造和釋放各種激素。然而,這種釋放是可以被抑制的。當血液中的某種激素濃度過高時,這種激素可以抑制下視丘釋放相應的釋素,進而抑制腦垂體前葉釋放該激素,這就是一種負反饋調控機制。

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