Hormone is a chemical information substance synthesized by highly differentiated endocrine cells and secreted directly into the blood, which affects the physiological activities of the human body by regulating the metabolic activities of various tissues and cells. The highly effective bioactive substances secreted by endocrine glands or endocrine cells, as messengers, transmit information in the body and regulate the physiological process of the body are called hormones. It is an important substance in our life.

A class of chemicals produced by endocrine cells that efficiently transmit information. There are many kinds of hormones, but the quantity is very small (most of them are nanograms or even picograms). They are neither a source of energy nor a structural substance of the body, but they play an important role in coordinating physiological processes such as metabolism, growth and development by transmitting information. No wonder scientists call them "first messengers".

Common nitrogenous hormones in extended data are:

1, growth hormone

Its main function is to promote growth (mainly to promote protein synthesis and bone growth) and influence the metabolism of sugar, fat and protein.

2. Thyroid stimulating hormone

Its main function is to promote the growth and development of gonads and regulate the synthesis and secretion of sex hormones.

3. Gonadotropin

Its main function is to promote the growth and development of gonads and regulate the synthesis and secretion of sex hormones.

4. Thyroid stimulating hormone releasing hormone

Its main function is to stimulate pituitary synthesis and secretion of thyroid stimulating hormone.

5. Gonadotropin-releasing hormone

Its main function is to promote pituitary synthesis and secrete gonadotropin.

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