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激素发挥生物效能,除了在血液中有正常水平使到达靶细胞有足够的浓度外,尚须靶细胞有必备的激素受体数量及其对激素的亲和力.只有这样,才能使到达靶细胞的激素和它们的受体结合,形成有活性的激素-受体复合物,进而将激素信号转化为细胞内的一系列化学反应,才能表现为激素的生物效应.老年期,激素系列有许多异常表现,如内分泌腺体形态异常、激素的生物合成、释放、降解、排泄等代谢异常,而且靶细胞的激素受体也有异
Hormones play a biological role, in addition to the normal levels in the blood to reach the target cells have enough concentration, but also the target cells have the necessary hormone receptor and its affinity for hormones. Only in this way to reach the target cells Hormones and their receptors combine to form an active hormone-receptor complex, which in turn transforms the hormone signal into a series of chemical reactions in the cell to show the biological effects of hormones. In the elderly, the hormone family has many abnormalities , Such as abnormal endocrine gland morphology, hormone biosynthesis, release, degradation, excretion and other metabolic abnormalities, and the target cell hormone receptors are also different