These receptors control the activity of the hypothalamo-pituitary adrenal (HPA) axis, an endocrine system that is activated in response to stress.

这些受体可以控制下丘脑-垂体-肾上腺（HPA）轴的活性，HPA轴是一个对应激产生反应的内分泌系统。

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Avian broilers were used as experimental objects to study the mechanism of the pituitary adrenal axis regulating immune system when being infected with virulent infectious bursal disease virus (IBDV).

以艾维茵肉鸡为试验动物，研究了垂体肾上腺轴在传染性腔上囊病病毒(IBDV)强毒株攻击时对免疫系统的调节作用。

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DATA SYNTHESIS: Acute stress affected the immune system mainly by inducing the changes of organism through hypothalamus-pituitary-adrenal cortex axis and sympathetic nervous system.

资料综合：急性应激主要通过下丘脑-垂体-肾上腺皮质轴和交感神经系统引起机体免疫系统的变化。

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