the fight or flight response

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  • Fight or Flight
    • stages
      • sympathetic NS stimulates adrenal medulla
      • hypothalamus activates SAM pathway (to adrenal medulla & sympathetic NS)
      • this secretes adrenaline & noradrenaline to bloodstream
      • amygdala activated & sends distress signal to hypothalamus
      • psychological changes to prepare body for fight/ flight
        • after, parasympathetic NS activated to return body to rest so slows down breathing, heart rate etc
      • person in stressful situation
    • strengths
    • weaknesses: our reaction is not limited to fight/flight (initial freeze response); typically male response (androcentric) women more likely to tend & befriend; beta bias; modern day stressors activating response not healthy (maladaptive)
    • response changes
      • pupil dilation for more light entry in eye & better vision
      • increased breathing rate for more oxygen intake
      • sweat production to regulate temperature
      • increased heart rate to increase blood flow & movement of adrenaline
      • reduction of non essential functions i.e. digestive system for more energy to other functions


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