Seyle's GAS Response: Alarm Reaction

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  • Created by: tidytayah
  • Created on: 17-10-14 21:26
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  • Stage 1: Alarm Reaction
    • Once the stressful event has been registered, the body needs additional energy to deal with it.
      • Perception of a stressful event causes stimulation of the hypothalamus in the brain.
        • This activates the sympathetic branch of the autonomic nervous system (ANS).
          • Sympathetic activation stimulates the adrenal glands.
            • The adrenal glands sit above the kidneys and are made up of 2 parts. The inner part is called the adrenal medulla
              • The adrenal medulla then releases 2 hormones - adrenaline and noradrenaline- into the bloodstream.
                • Both help the body in energy expenditure (fight or flight) by increasing heart rate, blood pressure and blood sugar levels.


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