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The content of Chapter 1 of High School Biology Compulsory 3 is the internal environment and homeostasis of the human body, what knowledge points need to be mastered? The following is the knowledge points of Chapter 1 of High School Biology Compulsory 3 that I have brought to you, I hope it will be helpful to you.

1. Bodily fluids: A large number of water-based objects contained in the body.

2. The significance of internal environmental homeostasis: internal environmental homeostasis is a necessary condition for the body to carry out normal life activities.

3. Internal environment: a liquid environment composed of extracellular fluid. Internal environment: It is the medium through which cells exchange substances with the external environment.

4. The composition and content of interstitial fluid and lymph are similar to those of plasma, but not identical, the main difference is that plasma contains more protein, while interstitial fluid and lymph contain less protein.

5. Physical and chemical properties of extracellular fluid: osmotic pressure, pH, temperature.

6. pH in plasma:

Conditioned reagents: Buffer solution: NaHCO3 H2CO3 NA2HPO4 NAH2PO4

7. Normal osmotic pressure of human extracellular fluid: 770kpa

Normal temperature: 37 degrees.

8. Homeostasis: The normal body makes various organs and systems coordinate their activities and maintain them together through regulation.

A relatively stable state of the environment. Homeostasis of the internal environment refers to the fact that the composition and physicochemical properties of the internal environment are in dynamic equilibrium.

9. Homeostatic regulation: neuro-humoral and immune co-regulation.

First, the environment in which the cells live:

1. Single cells (such as paramecium) directly exchange substances with the external environment.

2. Multicellular animals exchange substances through the internal environment as a medium.

External environment: plasma, interstitial fluid, cells (internal fluid).

Metabolic waste, CO2 lymphatic metabolic waste, CO2 internal environment.

Extracellular fluid is also known as the internal environment (which is the medium through which cells exchange substances with the external environment).

The internal environment of blood cells is plasma.

The internal environment of lymphocytes is lymph.

The internal environment of the capillary wall is plasma, tissue fluid.

The internal environment of capillary lymphatic vessels is lymphatic and interstitial fluid.

3. The composition and content of interstitial fluid and lymph are similar to those of plasma, but not identical, the main difference is that plasma contains more protein, while interstitial fluid lymph contains less protein.

4. Physical and chemical properties of the internal environment: osmotic pressure, pH, temperature.

The size of plasma osmolality is mainly related to the content of inorganic salts and proteins. Na+ and Cl- were dominant in inorganic salts.

The osmotic pressure of extracellular fluid is about 770kpa, which is equivalent to the osmotic pressure of intracellular fluid;

The plasma of normal people is nearly neutral, and the pH is related to HCO3- and HPO42- plasma;

The person's body temperature is maintained at around 370C (generally not more than 10C).

Homeostasis refers to the normal organism through regulation, so that various organ systems coordinate their activities to jointly maintain a relatively stable state of the internal environment. The internal environmental composition is relatively stable.

The physical and chemical properties of the internal environment are relatively stable, and the pH value (pH value).

Osmotic homeostasis is based on the coordinated functioning of organ systems.

Regulatory mechanisms: neuro-humoral immunity.

Compulsory 3: Compilation of knowledge points of homeostasis and environment.

Chapter 1: The internal environment and homeostasis of the human body.

1. Body fluids: body.