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问题:

对下丘脑促性腺激素释放激素的正确叙述是 A.属于肽类激素 B.神经冲动到达时释放 C.

对下丘脑促性腺激素释放激素的正确叙述是

A.属于肽类激素

B.神经冲动到达时释放

C.通过垂体可激发排卵和促进孕激素生成

D.对性腺也有直接的刺激作用


  参考答案

正确答案:ABC

132.答案:ABC

[考点] 下丘脑调节肽及其作用

[分析] 下丘脑促性腺激素释放激素是下丘脑肽能神经元释放的激素,化学结构属于肽类。由于是神经激素,当相应神经元的动作电位到达其轴突末梢时释放,因而是脉冲式释放。当促性腺激素释放激素在腺垂体释放增加时,可通过腺垂体促性腺激素激发排卵和促进孕激素生成,但对性腺没有直接的刺激作用。

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