Sweat is a product secretion of sweat glands. Colorless, slightly opalescent liquid salty taste.
The pot contains 98-99% water, urea (about 0.1%), uric acid, creatinine, serine, fats, volatile fatty acids, soap, cholesterol, salt, alkali metals (dominated by NaCl, about 0.3%), paired ether-sulfuric acid and aromatic hydroxy acid. In P. contains Na - 58,4 mg-EQ, or 134 mg%To 10 mg-EQ, or 39 mg%, Cl - 45,4 mg-EQ, or 161 mg%. With a sharp restriction of Na in food its content in the sweat is reduced. Assume that the PA comes from the interstitial fluid, concentration of Na in which is the same as in the plasma. Since the concentration of sodium in Petrograd less than in the plasma, suppose it to a greater or lesser extent depending on the conditions delayed in the sweat glands. Some people with P. strenuously are chlorides, which can lead to deficiency in the body of salt. The sodium content in the sweat is reduced under the influence mineralokortikoidov. Introduction ACTH reduces the sodium and chlorine with P. and urine. When edisonova disease increased the sodium and chlorine to the point Like urine, P. is the product selection from the blood in the first place, water and other light-diffusing ingredients.
Under physiological conditions qualitative composition of sweat little varies. However, allocated to different parts of the body sweat reveals significant variations in the quantitative composition and pH. This applies particularly to P., secureremote in the armpit and perineum apocrine glands. Active reaction P. allocated to the whole body surface so-called acronymy glands varies pH of 3.8 - 5.6 and apocrine glands secrete, the secret almost neutral reaction (pH 6,2 - 6,9).
The most acidic is the sweat when increased sweating (see). After a long sweating active reaction P. gradually approaching neutral. The share of sweat varies between 1,001 and 1,006, only in rare cases reaching 1,010. P. can have very unpleasant smell (sweat of the legs), mainly due to the presence of volatile fatty acids, easily produced in bacterial decomposition P. muscular work and especially in sports sweat contains a very large number of lactic acid (up to 500 mg% and more) and increased against the norms of the number of nitrogenous substances (up to 1 g nitrogen per day). The total amount by sweat substances is determined mainly by the degree of sweating, i.e., the amount of the formed within days of Peterhof, often reaching 1 l, and under certain conditions - 2 l and more. In this way since then can be allocated up to 2 g of salt and up to 1 g of nitrogen. In pathological conditions in the pot can be found glucose (diabetes), bile pigments, cystine (persons with cystinuria). When uraemia and cholera anuria the amount of sweat glands urea can grow so much that she deposited on the skin in the form of crystals. Mercury, arsenic, iron, iodine, bromine, quinine, benzoin, amber, tartaric, hippuric, salicylic acid, and that, antipyrine, methylene blue when introduced into the body appear in P. Blue color P. was observed from the presence of Indigo, pyocyanin, phosphate concentrate of iron. There is also, though very rarely, bloody sweat (the appearance of red blood cells in Petrograd). Cm. also the Sweat glands.