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Hans Selye (1907- 1982) was a Hungarian endocrinologist, first to give a scientific explanation for biological stress. Hans Selye explained his stress model based on physiology and psychobiology as General Adaptation Syndrome (GAS).His model states that an event that threatens an organismâs well-being (a stressor) leads to a three-stage bodily response: Stage 1: Alarm.onclusion. Hans Selye's theory profoundly influenced the scientific study of stress. Stress is a state produced by a change in the environment and the nature of the stressor is variable.
The first and most generic definition of stress is that proposed by Hans Selye: âStress is the nonspecific response of the body to any demand.â Selye repeatedly emphasized the fact that the continued use of the word stress as a nonspecificresponse to any demand was most appropriate.n addition to providing the first clear definition of stress, Hans Selye was also the first to recognize that homeostasis could not by itself ensure stability of body systems under stress.