This paper is a short review of literature data and results of our own investigation into the adaptive response (AR). It was aimed at the analysis of the AR induction, its formation, some mechanisms, its expansion, and universality. It is supposed that a lot of mechanisms, a high variability degree, the absence of this phenomenon in some individuals, as well as dependence on many situations make the AR induction not predictable. Perhaps AR induction is not a universal phenomenon in practice, as it was supposed earlier.
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