3.3.6 - General Adaptation Syndrome
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Introduction to General Adaptation Syndrome
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Today we're diving into the General Adaptation Syndrome, often referred to as GAS. Can anyone tell me how stress might affect our body?
I think stress can make us feel anxious or tired.
Yes, great point! GAS explains how our body experiences stress in three stages. The first is the alarm reaction. This is where we prepare to fight or flee when faced with a stressor.
What happens during that alarm phase?
In that phase, we experience a rush of hormones that increase our heart rate and prepare our body to respond swiftly. Remember the acronym 'A.R.E.' for Alarm, Resistance, and Exhaustion.
So after being alarmed, we resist stress?
Exactly! We'll address the resistance phase next.
Do we feel stressed all the time in that phase?
Not necessarily. In the resistance phase, we are actively coping with stress, but prolonged exposure can lead to the exhaustion phase. Let's summarize: Alarm prepares us for action.
The Three Stages of GAS
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Now, let's break down the three stages of GAS. Who remembers what happens after the alarm phase?
The resistance phase starts where we try to cope with stress.
Correct! During this phase, the body tries to adapt. It's crucial, but if the stress remains, we'll hit the exhaustion stage. Can someone tell me what might happen in exhaustion?
We feel completely drained and sick.
Exactly! The body's inability to maintain its defenses can lead to various illnesses, such as anxiety or even physical illnesses like heart disease.
Is that why some people get sick during exams?
Yes! Stress can weaken the immune system, making us more susceptible to illnesses. Let's remember the key stages: A for Alarm, R for Resistance, E for Exhaustion.
Impact of Stress on Health
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Now that we understand GAS, how do you think stress impacts our health overall?
It can cause health issues and affect our mood.
Absolutely. Prolonged stress can lead to chronic health problems. What are some ways we manage or adapt to stress?
We could exercise, meditate, or find support.
Wonderful suggestions! Managing stress effectively can help mitigate the negative consequences outlined in GAS. Remember, keeping stress in check helps maintain health and well-being.
So, coping strategies can help prevent exhausting our resources?
Exactly! The better we manage stress, the more resilient we'll be in the face of challenges.
Introduction & Overview
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Quick Overview
Standard
General Adaptation Syndrome (GAS) refers to the body's response to prolonged stress, which occurs in three stages—alarm, resistance, and exhaustion. The quality of an individual's coping skills, personal perception of stress, and lifestyle choices significantly impact their health and psychological functioning.
Detailed
General Adaptation Syndrome (GAS)
General Adaptation Syndrome (GAS) is a model developed by Hans Selye that outlines how the body responds to stress in three distinct stages: alarm reaction, resistance, and exhaustion.
1. Alarm Reaction
This initial phase is triggered by a stressor that causes the body to prepare for a 'fight or flight' response, resulting in physiological changes such as increased heart rate and hormonal release. The body is primed to react to the challenge.
2. Resistance
If the stressor persists, the body enters the resistance stage where it attempts to adapt to the ongoing stress. During this time, physiological responses decrease, but the body stays on alert to cope with the stressor.
3. Exhaustion
Continued exposure to stress leads to the exhaustion stage, where the body's resources are depleted. Individuals may become more susceptible to stress-related illnesses, as the body's adaptations can no longer be sustained. Chronic stress during this phase can result in health issues such as cardiovascular problems, anxiety, and a weakened immune system.
Understanding GAS is crucial as it highlights the potential harmful effects of prolonged stress on psychological functioning and physical health.
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Introduction to General Adaptation Syndrome
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Chapter Content
What happens to the body when stress is prolonged? Selye studied this issue by subjecting animals to a variety of stressors such as high temperature, X-rays and insulin injections, in the laboratory over a long period of time. He also observed patients with various injuries and illnesses in hospitals. Selye noticed a similar pattern of bodily response in all of them. He called this pattern the General Adaptation Syndrome (GAS).
Detailed Explanation
The General Adaptation Syndrome (GAS) refers to a three-stage process that describes how the body reacts to stress over time. Hans Selye, a pioneering researcher, discovered this model while observing reactions in animals and patients under stress. The three stages are: Alarm Reaction, Resistance, and Exhaustion. Understanding these stages helps us see how stress affects our body physically and mentally, showing that our body has a standardized response to any stressor.
Examples & Analogies
Imagine if a firefighter is called to a blaze. Initially, there's a rush of adrenaline (Alarm Reaction) that prepares them to fight the fire. If the fire continues for a long time, they find ways to manage the situation (Resistance)—maybe implementing strategies to control and tame the flames. However, if the fire is persistent and resources are drained, the firefighter starts to feel overwhelmed and exhausted (Exhaustion), making it more difficult to respond effectively.
Stages of General Adaptation Syndrome
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Chapter Content
According to him, GAS involves three stages: 1. Alarm reaction stage: The presence of a noxious stimulus or stressor leads to activation of the adrenal-pituitary-cortex system. This triggers the release of hormones producing the stress response. Now the individual is ready for fight or flight. 2. Resistance stage: If stress is prolonged, the resistance stage begins. The parasympathetic nervous system calls for more cautious use of the body's resources. The organism makes efforts to cope with the threat, as through confrontation. 3. Exhaustion stage: Continued exposure to the same stressor or additional stressors drains the body of its resources and leads to the third stage of exhaustion. The physiological systems involved in alarm reaction and resistance become ineffective and susceptibility to stress-related diseases such as high blood pressure becomes more likely.
Detailed Explanation
The GAS outlines how stress affects us over time through three clear phases. 1. In the Alarm Reaction stage, our body reacts immediately to stressors, prepared to face danger or escape. 2. The Resistance stage focuses on maintaining body functions under stress, where we adapt to the ongoing stressor. 3. Finally, the Exhaustion stage describes the breakdown of those functions, as continuous stress overwhelms our physical and mental resources, leading to fatigue and increased vulnerability to illnesses.
Examples & Analogies
Consider how a student studying for final exams reacts. Initially, during the Alarm Reaction, they feel energized, alert, and focused. As they keep studying for long hours (Resistance), they learn to manage their time, but eventually, if the studying continues without breaks or help, they may enter Exhaustion, feeling burnt out and unable to retain information, ultimately affecting their health and academic performance.
Criticism of Selye's Model
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Selye's model has been criticised for assigning a very limited role to psychological factors in stress. Researchers have reported that the psychological appraisal of events is important for the determination of stress. How people respond to stress is substantially influenced by their perceptions, personalities and biological constitutions.
Detailed Explanation
While Selye's GAS model highlights the physical responses of stress, it has been critiqued for not taking into account individual differences in perception and coping. The context in which stressors are encountered and individual experiences significantly affect our responses. This means that not everyone reacts to the same stressor in the same way—our backgrounds and mental states play important roles.
Examples & Analogies
Think of how different people might react to the same job interview. One person might view it as an exciting challenge (leading to positive stress), while another may see it as a threatening situation, causing panic and anxiety. Their differing perceptions illustrate how the psychological aspect of stress can influence outcomes beyond the physiological responses described by Selye.
The Effect of Stress on Health
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Chapter Content
Stress can cause illness by impairing the workings of the immune system. The immune system guards the body against attackers, both from within and outside. Psychoneuroimmunology focuses on the links between the mind, the brain and the immune system. It studies the effects of stress on the immune system.
Detailed Explanation
The relationship between stress and health is critical, as prolonged stress can weaken our immune system, making us more susceptible to diseases. Psychoneuroimmunology studies this link by examining how stress signals from the brain affect immune responses in the body. The body's ability to fight off infections is impacted by our stress levels, illustrating the importance of managing stress to maintain overall health.
Examples & Analogies
Imagine a soldier in a combat zone. High levels of stress can weaken their body’s defenses, making it easier for them to get sick despite basic health. A similar concept applies to anyone experiencing chronic stress; they might notice they catch colds more easily or experience flare-ups of existing health issues when under pressure. This emphasizes the need for stress management practices to keep our immune system strong.
Key Concepts
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Alarm Reaction: The body's initial response to stress where it prepares for fight or flight.
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Resistance Stage: The phase of coping where the body attempts to withstand the stress.
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Exhaustion Stage: The final stage when stress leads to depletion of resources and health issues.
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General Adaptation Syndrome (GAS): A model describing the body's response to stress in three stages.
Examples & Applications
During an exam, a student can experience an alarm reaction characterized by increased heart rate.
A person facing ongoing work stress might adapt to it initially, but prolonged exposure can lead to exhaustion and illness.
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Rhymes
When stress is strong, be alarmed, find your fight, keep calm, and stay in sight.
Stories
Imagine a knight facing a dragon. The alarm signals the battle beginning, resistance is when he fights bravely, but if he stands too long, he will tire out and be defeated.
Memory Tools
A-R-E: Alarm, Resistance, Exhaustion - track your body's stress evolution.
Acronyms
GAS
General Adaptation Syndrome helps us understand stress response phases.
Flash Cards
Glossary
- Alarm Reaction
The initial phase of the stress response characterized by heightened sensory awareness and physiological readiness.
- Resistance
The second phase where the body attempts to adapt to the stressor and maintain an ideal functioning level.
- Exhaustion
The final phase when the body's resources are depleted due to prolonged stress exposure.
- General Adaptation Syndrome (GAS)
A three-stage model that describes the body's physiological response to stress.
- Stress
A state of mental or emotional strain resulting from adverse or demanding circumstances.
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