What Is General Adaptation Syndrome (GAS)?


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General Adaptation Syndrome (GAS) is a model of stress described by Hans Selye. This model comprises of three stages –

(A) Alarm Reaction
(B) Resistance or Adaptation
(C) Exhaustion

The alarm stage is characterized by body's response to stress – both physiologically and psychologically. At physiological level, in alarm stage, the body may experience fast-beating heart, butterflies in stomach, increased blood pressure, heavy breathing, eye dilation, dry mouth. At psychological level, one may experience anxiety; flight or fight response; intense concentration over the problem till it gets over.

At the resistance stage, the body might get immune in such a way, that even the stressors are present, the body responds in a susceptible pattern leading the body being weak day by day.

The final stage is known as exhaustion, in which the body's immune system completely breaks up and the psychological and physiological devastation takes place. If we continue our resistance in a similar fashion we may even die. In the other way out, the body starts releasing hormones to bring homoeostasis in the system.

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