Protein occupies one of the most important places among all the organic elements of a living cell. It is almost half the cell mass. In the human body there is a constant exchange of proteins, which come along with food. In the digestive tract, proteins break down into amino acids. The latter penetrate into the blood and, passing through the cells and vessels of the liver, enter the tissues of the internal organs, where they are again synthesized into specific proteins for the given organ.
Protein metabolism
The human body uses protein as a plastic material. Its need is determined by the minimum volume that balances protein losses. In the body of an adult healthy person, the exchange of proteins occurs continuously. In the case of insufficient intake of these substances with food, ten of the twenty amino acids can be synthesized by the body, while the other ten remain irreplaceable, and they must be replenished. Otherwise, a protein synthesis breakdown occurs, which leads to inhibition of growth and a decrease in body weight. It should be noted that if there is at least one indispensable amino acid missing, the body can not normally live and function.
Stages of protein metabolism
The exchange of proteins in the body occurs as a result of the intake of nutrients and oxygen. There are certain stages of metabolism, the first of which is characterized by enzymatic digestion of proteins, carbohydrates and fats to soluble amino acids, monosaccharides, disaccharides, fatty acids, glycerol and other compounds, after which they are absorbed into the lymph and blood. At the second stage, nutrients and oxygen are transported by blood to the tissues. In this case, their splitting to final products occurs, as well as the synthesis of hormones, enzymes and constituent components of the cytoplasm. During the splitting of substances, energy is released, which is necessary for natural processes of synthesis and normalization of the work of the whole organism. The above stages of protein metabolism result in the removal of final products from the cells, as well as their transport and secretion of the lungs, kidneys, intestines and sweat glands.
Benefits of proteins for human
For human body it is very important to supply full proteins, because only from them specific substances can be synthesized. A special role is played by protein metabolism in the child's body. After all, he needs a large number of new cells for growth. With insufficient intake of proteins, the human body ceases to grow, and its cells are renewed much more slowly. To full-fledged animal proteins. Of these, proteins of fish, meat, milk, eggs and other similar foods are of particular value. Deficient are mainly contained in plants, so the diet should be composed in such a way as to satisfy all the needs of your body. With an overabundance of proteins, their excess breaks up. This allows the body to maintain the necessary chemical equilibrium. The exchange of proteins is very important for human life. With its violation, the body begins to consume the protein of its own tissues, which leads to serious health problems. Therefore, you should take care of yourself and take seriously the choice of food.