[Adaptation of the functional system of the living organism to nonregular conjugated actions]

A semiphenomenological approach to the study of the adaptation of a particular functional system of the living organism to nonregular changes in the environmental parameter conjugated with this system was suggested. It was shown that the behaviour of the functional system under these conditions is similar to that of a macroparticle in the rotational Brownian motion. In the adaptation process, a phase of superadaptation at the smallest nonregular actions was revealed. Some examples supporting the occurrence of the superadaptation phase are presented.