For example, the characteristic of brain development is to complete cell proliferation at one time, and the growth of human brain cells has two peaks. The first is when the fetus is three months old; The second is the period from birth to one year old, especially 0-6 months, when brain cells grow violently. By the age of one, the proliferation of brain cells is basically completed, and its number has reached 9/ 10 of that of adults. Therefore, 0- 1 year-old children have unique intake requirements for protein, which is particularly important for children's intellectual development.
2. Repair human tissues: The human body is composed of 10 trillion cells, which can be said to be the smallest unit of life. They are in an endless process of aging, death and rebirth. For example, the epidermis of young people is updated once every 28 days, while the gastric mucosa is completely updated in two or three days. Therefore, if a person has a good intake, absorption and utilization of protein, his skin will be shiny and elastic. On the contrary, people are often in a sub-health state. Tissue damage, including trauma, can not be repaired in time and with high quality, which will accelerate the decline of the body.
3. Maintain normal metabolism and transport of various substances in the body. Carrier protein is very important for maintaining normal life activities of human body. Can carry all kinds of substances in the body. For example, hemoglobin transports oxygen (the renewal rate of red blood cells is 2.5 million/sec), lipoprotein transports fat, receptors and transporters on cell membranes.
4. Albumin: Maintain the balance between osmotic pressure and body fluids.
5. Maintain the acid-base balance of body fluids.
6, immune cells and immune proteins: there are white blood cells, lymphocytes, macrophages, antibodies (immunoglobulin), complement, interferon and so on. It is updated every seven days. When protein is abundant, this unit will be very strong. If necessary, it can be increased by 100 times in a few hours.
7. Various enzymes that constitute the basic catalytic and regulatory functions of human body. There are thousands of enzymes in our body, and each enzyme can only participate in one biochemical reaction. There are more than 100 biochemical reactions in human cells every minute. Enzymes can promote the digestion, absorption and utilization of food. If the corresponding enzymes are sufficient, the reaction will proceed smoothly and quickly, and we will be full of energy and not easy to get sick. Otherwise, the reaction will slow down or be blocked.
8, the main raw materials of hormones. It can regulate the physiological activities of various organs in the body. Insulin is synthesized by 5 1 amino acid molecule. Auxin is synthesized by 19 1 amino acid molecule.
7. It constitutes neurotransmitters such as acetylcholine and serotonin. Maintain the normal functions of the nervous system: taste, vision and memory.
8. Collagen: It accounts for 65,438+0/3 of protein of the body, generates connective tissue and forms the bones of the body. Such as bones, blood vessels and ligaments. , determine the elasticity of the skin and protect the brain (a large part of brain cells are collagen cells, forming a blood-brain barrier to protect the brain)
9. Provide heat energy.