---
title: "General Adaptation Syndrome (GAS) — AP Psych Definition"
description: "General Adaptation Syndrome (GAS) is Hans Selye's three-stage model of how your body reacts to stress. Learn the alarm, resistance, and exhaustion stages for AP Psych Topic 7.4."
canonical: "https://fiveable.me/ap-psych-revised/key-terms/general-adaptation-syndrome-gas"
type: "key-term"
subject: "AP Psychology"
---

# General Adaptation Syndrome (GAS) — AP Psych Definition

## Definition

General Adaptation Syndrome refers to the body's three-stage response to stress, proposed by Hans Selye. The stages include alarm reaction, resistance, and exhaustion.

## Review

### Related Terms

- Alarm Reaction: This refers to the initial response of your body when faced with a stressful situation.
- Resistance Stage: This is when your body adapts and tries to cope with ongoing stress.
- Exhaustion Stage: This is the final stage of GAS when prolonged or severe stress depletes your body's resources.