Homeostasis properties of dynamic systems as evaluation method for the functional state of children

The model, criteria and the trajectory of the equilibrium balanced functioning of dynamic biological systems аre described in the paper. The concepts of system kinetic and potential energy for the description of the metabolic processes in biological systems are included. Metabolic processes in the biosystem are associated with the consumption of kinetic energy to perform work (property of reactivity) and recover of potential energy (reserve capacity of the organism). System model, which reflects the energy- exchange processes in the organism and allows obtaining an adequate assessment of the state of biological systems, is shown in the work. The magistral method for the analysis of biological systems in their balanced equilibrium motion is presented. Macroparameters which evaluate not only rate of state variables, but also the nature of the system stress state have been developed. Estimates characterizing the elastic properties of the organism were obtained. Comprehensive approach of functional assessment is proposed. It provides an opportunity to detect and prevent not only diseases, but also the state on the verge of norm and pathology, which is especially important for young children. An illustrative example is presented and the results are analyzed. The deterioration of the organism's homeostatic properties indicates the appearance of defects in the internal structure of the biosystem. Therefore, a signal about violation of homeostatic properties can be used for diagnostic and prognostic purposes. are provided, and the normal functioning of systems in a changing environment and random perturbations is observed. Homeostasis can be compared metaphorically with the property of elastic bodies restore their geometric shapes under the influence of mechanical forces. The appearance of residual effects (not saving geometric shapes) in responses to mechanical stress is a violation of the internal structure of bodies and their elastic properties. It is worth mentioning that the homeostatic properties of the system are caused by individual characteristics, but basically have a single structural form. If m vitally important variables xi are within acceptable limits ximin≤xi ≤ximax (i = 1, ..., m), then we have homeostasis. The intensity of life processes decreases beyond these limits, and if there are significant violations, the process is stopped. Energy-exchanged processes are characterized by constancy in the homeostasis area.