What is steady state? What is the essence of steady state? What is the significance of homeostasis?

Steady-state physiologists say that a normal body, under the control of nervous system, body fluid and immune system, makes all organs and systems coordinate their activities and maintain a relatively stable internal environment, which is also called steady state.

The substantial steady state of steady state is a dynamic balance achieved in constant motion; That is to say, under the condition of suffering from various external interference factors, various organs and systems coordinate their activities through complex regulatory mechanisms in the body. This stability is relative, not absolute. Once the steady state is destroyed, it will lead to the death of the body.

The significance of internal environment homeostasis The metabolism of the body is composed of many complex enzymatic reactions in cells, and the enzymatic reactions need mild external conditions, such as temperature and pH, to make the enzymatic reactions run normally. It can be seen that the steady state of the internal environment is a necessary condition for the body to carry out normal life activities. When the homeostasis of the internal environment is destroyed, it will cause cell metabolism disorder and lead to diseases. For example, the decrease of calcium and phosphorus content in blood will affect the calcification of bone tissue, which is manifested as osteomalacia in adults and rickets in children with bone growth disorder and incomplete ossification. Excessive blood calcium can cause muscle weakness and other diseases.

2. With the development of cybernetics and other life sciences, homeostasis not only refers to the stable state of the internal environment, but also extends to many physiological processes that maintain harmony and stability in organisms, such as the maintenance of life activity function and normal posture (upright posture and walking posture). It is also used for the stable state of different levels or levels of the body (cells, tissues and organs, systems, whole, social groups); And a specific state maintained within a specific time (from milliseconds to tens of thousands of years). Steady state is not only physiology, but also a basic concept of life science today. It is of great significance to cybernetics, genetics (gene homeostasis regulation) and psychology (emotional homeostasis). ), pathology, clinical medicine and many other disciplines.