STRESS

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STRESS
- In everyday life
  - two physiological routes - messages are sent from higher brain centres
    - stressor - registered by the cortex
      - sends message to hypothalamus
        activates pituitary gland
        Sympathomedullary pathway
        adrenal medula
        (sympathetic arousal of nervous system)
        release of adrenaline + noradrenaline into bloodstream
        fight/flight
        increase oxygen intake
        
        release stored glucose
        
        divert resources away from digestion
        
        acute stressors - come across stressor: fight/flight reaction triggered
        
        controlled by electrical impulses through nerves
        
        Pituitary-adrenal gland
        adrenal cortex
        (ACTH released into bloodstream)
        release of corticosteroids into bloodstream
        liver releases glucose + suppresses immune system
        
        stressor is not dealt with straight away: endocrine system
        
        hormonal response - travels through blood
- biological response to a demand that threatens an organsim
Ready to expand energy by fighting or running away
- divert resources away from digestion
- release stored glucose
- increase oxygen intake

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