PHYS ED 32 Lecture Notes - Lecture 8: Sympathetic Nervous System, Cortisol, Endocrine System
22 Apr 2019
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A stressor is any physical of physiological event, real or imagined, that produces a reaction. Stress response is the collective physiological & emotional responses to any stimulus that disturbs an individual"s homeostasis. Endocrine system (glands) secretes hormones that influence metabolism. Norepinephrine (brain); epinephrine (adrenaline) and cortisol (adrenals) trigger the fight or flight reaction. Epinephrine: stress hormone secreted from inner part of adrenal glands that is accelerated (stimulator) Cortisol: stress hormone that has influence on learning, memory & protection; can have opposite effect is circulated around. Psychological and behavioral responses to stressors (fig 10. 3; pg. What can influence our emotional & behavioral responses are: Personality traits -- type a are ultra-competitive, controlling, impatient -- more problems if aggressive, hostile, cynical. The general adaptation syndrome (gas) (fig 10. 4; pg. Alarm: fight or flight reaction; susceptible to illness, disease. Resistance: coping stage; more resistant to injury, disease.
