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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.
In his later years, when asked to define stress, he told reporters, âEveryone knows what stress is, but nobody really knows.â. As noted, stress is difficult to define because it is so different for each of us. A good example is afforded by observing passengers on a steep roller coaster ride.Some are hunched down in the back seats, eyes shut, jaws clenched and white knuckled with an iron grip on the retaining bar.hat Selye proposed was just the opposite, namely that many different insults could cause the same disease, not only in animals, but in humans as well. Selyeâs theories attracted considerable attention and stress soon became a popular buzzword that completely ignored Selyeâs original definition.