Production of EPO hormone (erythropoietin) contributes to increasing the number of erythrocytes (red blood cells) and enriches the blood with oxygen, which is delivered to the muscles. Ultimately, the body's endurance is enhanced. Reduced levels of erythropoietin are detected in anemias of chronic diseases, chronic infections, autoimmune diseases, rheumatoid arthritis, oncological diseases.
The kidneys produce a special enzyme called renin, which converts into active forms of angiotensins involved in regulating blood pressure. Determining the activity of renin in the blood is used to diagnose arterial hypertension. Renin is a peptidase enzyme secreted by the kidneys into the bloodstream in response to a stressful situation. Excessive renin production can lead to the development of renal hypertension syndrome.
Kidney cells return vitamin D, which helps maintain calcium balance in the bladder and facilitates chemical reactions in the body.