Final answer:
The three-stage model of stress response, known as the general adaptation syndrome (GAS), consists of alarm reaction, stage of resistance, and stage of exhaustion.
Step-by-step explanation:
The three-stage model of stress response, known as the general adaptation syndrome (GAS), was developed by Hans Selye. It consists of three stages: alarm reaction, stage of resistance, and stage of exhaustion.
In the alarm reaction stage, the body experiences an immediate physiological response to a threatening situation, similar to the fight-or-flight response. During the stage of resistance, the body adapts to the stressor and remains on alert. If the stress continues for a prolonged period, the body enters the stage of exhaustion, which can lead to serious health issues.