Hormones are trace substances produced by specific tissues or cells in animals and plants that can cause strong excitatory effects. They are divided into three categories: nitrogen-containing (peptides, amino acids), sterols, and fatty acids. The regulation of metabolism by hormones is an important way of regulating bodily fluids.
Hormones, formerly known as "hormones". Digestive organs and tissues such as the placenta also secrete hormones, such as pancreatic secreting hormone, gastric secreting hormone, chorionic gonadotropin, etc. The coordinated action of various hormones is necessary for maintaining the metabolism and function of the body. In terms of chemical properties, some hormones are amine derivatives, such as adrenaline, thyroxine, etc; Some are peptides or proteins, such as pituitary hormone releasing factor, pituitary hormones, insulin, glucagon, calcitonin, parathyroid hormone, etc; Some are steroid compounds, such as androgens, estrogen, adrenal cortex hormones, etc. Many hormone preparations and synthetic products have important applications in medicine and animal husbandry.
