| Stage | Name | Description | |-------|------|-------------| | 1 | | The body detects a stressor; sympathetic nervous system activates “fight-or-flight.” Adrenaline and cortisol rise. Short-term resistance drops. | | 2 | Resistance | If stress continues, the body adapts. Cortisol levels remain elevated but stable. Resources are mobilized to resist the stressor. | | 3 | Exhaustion | Prolonged stress depletes adaptive energy. Resistance collapses, leading to fatigue, burnout, illness (e.g., ulcers, hypertension), or death. |
Selye’s most enduring contribution is the General Adaptation Syndrome (GAS) , a three-stage model describing the physiological changes the body undergoes when exposed to stressors: hans selye pdf
Hans Selye’s General Adaptation Syndrome remains a classic framework for understanding the body’s reaction to persistent challenges. Although modern stress models are more nuanced, Selye’s core insight—that chronic stress can exhaust physiological reserves and cause disease—is fundamental to health science. Cortisol levels remain elevated but stable
Hans Selye's work has had a lasting impact on our understanding of stress and its effects on the body. His research has influenced fields such as psychology, medicine, and endocrinology, and continues to be relevant today. leading to fatigue
[Your Name] Date: [Current Date] Subject: Physiology / Health Psychology