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Secrete hormone-releasing hormones. These hormones act on the pituitary gland and regulate the secretion and release of corresponding hormones by the pituitary gland.

Under the regulation of hormones secreted by the hypothalamus, secretion of hormones regulates the secretory activities of the corresponding endocrine glands. Secrete growth hormone, regulate growth and development, etc.

Under the regulation of hormones secreted by the pituitary gland, it secretes thyroid hormone, etc.; thyroid hormone has the functions of regulating the metabolism of organic matter in the body, promoting growth and development, and increasing nerve excitability.

It is regulated by hormones secreted by the pituitary gland and is divided into two parts: the cortex and the medulla. The former mainly secretes aldosterone, cortisol, etc., and regulates water and salt metabolism and organic matter metabolism. The latter can secrete adrenaline and improve the body's stress ability.

There are a variety of secretory cells in the pancreatic islets. The islet B cells secrete insulin and the islet A cells secrete glucagon. These two hormones play an important regulatory role in glucose metabolism.

It is regulated by hormones secreted by the pituitary gland; the estrogen and progesterone secreted can promote the development of female reproductive organs, the production of egg cells, and the emergence of female secondary sexual characteristics.

It is regulated by hormones secreted by the pituitary gland; the androgens (mainly testosterone) secreted can promote the development of male reproductive organs, the production of sperm cells, and the emergence of male secondary sexual characteristics.

①Carbohydrates in food → digestion and absorption

② Liver glycogen → decomposition

③ Fat and other non-sugar substances → Conversion

blood sugar (3.9~6.1 mmol/L )

hypothalamic-pituitary-thyroid axis

Hormones select target cells through mutual recognition and specific binding to specific receptors (direct causes) on target cells.

Hormones are inactivated once they are accepted by target cells and act.

(graded adjustment)

In addition to hormones, some other chemicals, such as histamine, certain gas molecules (NO, CO, etc.) and some metabolic products (such as CO,) can also serve as humoral factors to regulate the functions of cells, tissues and organs.

source:

Directions:

cold:

hot

Source: food, drinking water, metabolic water production

Departure: skin, breath, kidneys, feces

Not drinking enough water and losing too much water in the body Or the food you eat is too salty