Alarm reaction

Alarm Reaction is the initial stage in a three-stage process outlined in the General Adaptation Syndrome (GAS) model, proposed by Hans Selye. This model describes the body's short-term and long-term reactions to stress.

Overview

The Alarm Reaction stage refers to the initial symptoms the body experiences when under stress. During this phase, the body reacts to the perceived threat or stressor, initiating a fight or flight response. This response is characterized by a burst of energy provided by the release of adrenaline and cortisol from the adrenal glands.

Physiological Responses

During the Alarm Reaction stage, the body undergoes several specific responses. The sympathetic nervous system is activated and the heart rate increases, blood is diverted away from other body systems like the digestive system to the muscles, providing the body with a burst of energy and physical alertness. This enables it to handle stressful situations.

Alarm Reaction and Health

While the Alarm Reaction stage is a normal and necessary response to stress, prolonged exposure to stress can lead to the second and third stages of the GAS model, which are the resistance stage and exhaustion stage. These stages can lead to a variety of health issues, including heart disease, hypertension, diabetes, anxiety disorders, and depression.

See Also

• Fight or flight response
• Stress (biology)
• Hans Selye
• General Adaptation Syndrome