The urine of a healthy person does not contain the Bence-Jones protein, which is represented by light chains of immunoglobulins that are detected as a result of the formation of malignant tumor processes.
Homocysteine is a product of the exchange of amino acids (conversion of methionine to cysteine). Approximately 70% of plasma homocysteine is associated with albumin, 30% is oxidized to disulfide and only 1% is in a free state.
Ammonia - a product of protein metabolism, is formed in all tissues. The largest amount of ammonia (80%) is formed inside the intestines under the influence of bacteria.
Uric acid is a product of the exchange of purine bases, which are part of complex proteins-nucleoproteins. Formed uric acid is secreted by the kidneys.
The test of Reberg-Tareev allows to judge the glomerular filtration and tubular reabsorption in the kidneys. The test is based on the fact that creatinine is filtered only by the glomerulus, is not practically absorbed and secreted by the tubules in a small amount.
Daily excretion of creatinine with urine is relatively constant, is equivalent to daily production and directly depends on the mass of muscles and excretory capacity of the kidneys.
