Cellular Elements Could Not Work As A

cellular elements could not work as a unit if in an organism there was no refined mechanism of regulation. The special role in regulation is played by nervous system and system glands. But in the difficult mechanism of regulation there are some floors, and the first of them is cellular level. A cage - a life basis. This ancient expression and now remains true, getting more and more deep sense. Each cage - the tiny carrier of a life which has subordinated own freedom of activity of an organism as a whole. In each cage of a body the genetic information, sufficient is concluded that all organism has been reproduced. This information is written down in structure of a deoxyribonucleic acid (DNA) and concluded in the genes located in a kernel. Therefore the kernel long time was considered as the main component of a cage. Then value of other components of a cage has been understood, and before scientists the surprising picture has opened. In cages of all higher organisms formations-mitohondrii, being as though have been found out by the furnace where there is a basic burning of the fuel used by an organism.

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.