1, an important part of cells and organisms.

2. Maintain the life activities of cells and organisms.

3. Maintain cell osmotic pressure and acid-base balance.

mineral salt

Inorganic salts (mineralsalt) are salts in inorganic compounds, formerly called minerals, and generally only account for 65,438+0% to 65,438+0.5% of the fresh weight in biological cells. More than 20 species have been found in human body, among which a large number of elements are Ca, P, K, S, Na, Cl and Mg, and trace elements are Fe, Zn and Zn.

Although the content of inorganic salts in cells and human body is very low, it plays a very important role. If we pay attention to the diversification of diet, eat less animal fat, eat more coarse grains such as brown rice and corn, and don't eat too much refined flour, we can maintain the normal level of inorganic salts in the body.

physiological action

1, the distribution of inorganic salts in the body is extremely uneven. For example, most of calcium and phosphorus are in hard tissues such as bones and teeth, iron is concentrated in red blood cells, iodine is concentrated in thyroid, barium is concentrated in adipose tissues, cobalt is concentrated in hematopoietic organs, and zinc is concentrated in muscle tissues.

2. Inorganic salts are very important to the structure of tissues and cells. Hard tissues such as bones and teeth are mostly composed of calcium, phosphorus and magnesium, while soft tissues contain more potassium. Inorganic salt ions in body fluids regulate the permeability of cell membrane, control water, maintain normal osmotic pressure and acid-base balance, help transport common elements to the whole body, and participate in nerve activity and muscle contraction.

Due to metabolism, a certain amount of inorganic salts are discharged from various channels every day, so it must be supplemented by diet. The metabolism of inorganic salts can be judged by analyzing the concentration in blood, hair, urine or tissues. The functions of inorganic salts in human body are interrelated. In a suitable concentration range, it is beneficial to the health of people, animals and plants. Lack or excess will cause diseases, and diseases affect their metabolism and often increase their consumption.

4. It is to maintain the acid-base balance in cells, regulate osmotic pressure, and maintain the morphology and function of cells. Such as: calcium ions and potassium ions in blood.

5, is to maintain the life activities of organisms. For example, magnesium ion is the activator of ATPase, and chloride ion is the activator of sialidase.