Final answer:
The General Adaptation Syndrome (GAS) consists of three stages: alarm reaction, stage of resistance, and stage of exhaustion. It is the body's response to stress and can have significant impacts on health.
Step-by-step explanation:
The General Adaptation Syndrome (GAS), proposed by Hans Selye, consists of three stages: alarm reaction, stage of resistance, and stage of exhaustion. The alarm reaction is the body's immediate response to a threatening situation, comparable to the fight-or-flight response. The stage of resistance occurs when the body adapts to the stressor but remains prepared to respond. Finally, the stage of exhaustion is reached after prolonged exposure to stress and can lead to serious health problems.