Chapter 5. The Environment And Illnesses Of Ageing

Chapter 5. The Environment and illnesses of ageing In an organism in reply to any change of conditions demanding increase of its working capacity, there is a series of the stereotypic adaptive reactions directed on maintenance of its protection. Known physiologist Hans Sele has defined set of these protective reactions as an adaptable (adaptive) syndrome, or stress. Increase or ambient temperature fall, hunger or thirst, or physical effort, an infection or a trauma, an emotional pressure or - all it causes a number of changes in an organism which unite in concept " reaction". The organism in these cases as though is not interested in details, that is that makes feature of each of the listed factors - , and reacts as a whole to damaging factor. Stressornaja reaction is especially favourable to an organism that it is stereotypic: the organism has possibility at once to start protection, having used for this purpose one fixed reaction in reply to all variety extreme , or . Adaptation reaction, or stress, perhaps, most vigilant guard of an organism for it always automatically joins and without consciousness participation, and only under the influence of unconditioned reflexes - pains or changes of structure of the internal environment (for example, at a bleeding, at decrease in level of sugar in blood owing to starvation etc.