Functions of the Kidney

Functions of the Kidney

Functions of the Kidney The kidneys are involved in the following processes:* Excretion of unwanted substances, such as cellular metabolic waste, excess salts, and toxins. One product of amino acid metabolism is nitrogen-containing waste material, a chief form of which is urea. After synthesis in the liver, urea is transported in the blood to the kidneys for elimination. The kidneys have a specialized mechanism for the elimination of urea and other nitrogenous wastes.* Maintenance of water balance. Although the amount of water gained and lost in a day can vary tremendously, the kidneys can adapt to these variations, so that the volume of body water remains remarkably stable from day to day.* Regulation of the acid-base balance of body fluids. Acids are constantly being produced by cellular metabolism. Certain foods can yield acids or bases, and people may also ingest antacids, such as bicarbonate. However, if the body is to function normally, the pH of body fluids must remain in the...
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