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Stress
• Stress defined: Key descriptors
1. physiological or psychological
   tension
2. internal or external forces
3. exceeding a persons resources
   for their ability to cope
• Stress: involves both
   psychological & physiological
   changes
• What’s good about stress?
• What’s bad about stress?
Fight or Flight response
•   Definition: Key descriptors
•   automatic response
•   prepares animal
•   to confront - OR
•   flee
•   a physically or psychological
    threatening situation

• It’s an adaptive response
  because?
• Triggered by _____________
  nervous system
• Activates the HPA axis
HPA axis
• Hypothalamus triggers the release
  of
• CRH (Corticotrophin releasing
  hormone) which activates the
• Pituitary Gland which releases the
  hormone
• ACTH (Adrenocorticotropic
  hormone) which is carried by the
  blood to the
• Adrenal gland which releases stress
  hormones
• Cortisol/ Adrenalin and
  Noradrenalin
• To assist the body deal with the
  stressor
Cortisol
• Cortisol is a stress hormone
• Aids metabolism of
  fats, proteins, carb’s &
  increases glucose levels in
  the blood providing
  additional energy for muscles
• That is helpful in the short-
  term i.e. In the short term it
  acts to restore homeostasis
• Harmful in the long-term
  (weakens the immune
  system)
• It is released by the Adrenal
  Gland - but
• Regulated by Pituitary Gland

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Stress & HPA axis - VCE U4 Psych

  • 1. Stress • Stress defined: Key descriptors 1. physiological or psychological tension 2. internal or external forces 3. exceeding a persons resources for their ability to cope • Stress: involves both psychological & physiological changes • What’s good about stress? • What’s bad about stress?
  • 2. Fight or Flight response • Definition: Key descriptors • automatic response • prepares animal • to confront - OR • flee • a physically or psychological threatening situation • It’s an adaptive response because? • Triggered by _____________ nervous system • Activates the HPA axis
  • 3. HPA axis • Hypothalamus triggers the release of • CRH (Corticotrophin releasing hormone) which activates the • Pituitary Gland which releases the hormone • ACTH (Adrenocorticotropic hormone) which is carried by the blood to the • Adrenal gland which releases stress hormones • Cortisol/ Adrenalin and Noradrenalin • To assist the body deal with the stressor
  • 4. Cortisol • Cortisol is a stress hormone • Aids metabolism of fats, proteins, carb’s & increases glucose levels in the blood providing additional energy for muscles • That is helpful in the short- term i.e. In the short term it acts to restore homeostasis • Harmful in the long-term (weakens the immune system) • It is released by the Adrenal Gland - but • Regulated by Pituitary Gland

Notes de l'éditeur

  1. Stress helps performance
  2. Hypothalamus, pituitary gland, Adrenalin
  3. Cortisol released by Adrenal cortexAdrenalin/ noradrenalin released by adrenal medula
  4. Released by HPA axis Crying reduces cortisol levels which explains why you feel better