Chapter 4. The Law Of A Deviation Of

Chapter 4. The law of a deviation of a homeostasis The organism can exist, if the structure of its internal environment is supported in certain, enough narrow limits. This position - essence of the law of a constancy of the internal environment. Really, in norm the size of arterial pressure, concentration in blood of sugar, fat, cholesterol and other indicators fluctuate rather slightly. On the contrary, any proof deviation from normal limits speaks about illness: proof increase of arterial pressure is considered as a hypertension, sugar in blood - as a diabetes, cholesterol and fat ( ) - as an atherosclerosis risk factor. And so far as the constancy of the internal environment, or a homeostasis, should be protected so strictly special mechanisms of its maintenance are necessary also. At unicells owing to insufficient complexity of their structure such mechanisms cannot already be made. To It the death from the external reasons has risen an absolute obstacle in a way to a theoretical eternal life of the monocelled.