Stress Flashcards
what is stress
state of psychological strain caused by an unplesent stimulus
what is acute stress
little temporary stressor
what is chronic stress
long term
what is general adaptation syndrome
selyes explanation of how body responds in the same way to any stressor. they go through the stages alarm reaction, resistance and exhaustion
what are the 3 stages of general adaption syndrome
1) alarm reaction
2) resistance
3) exhaustion
what is the hypothalamic pituitary adrenal system (HPA)
controls how body responds to chronic stressor
how does the HPA system work
hypothalamus triggers pituitary gland to release ACTH hormone which stimulates release of cortisol
what is the sympathomedullary pathway (SAM)
controls how body initially responds to acute stressor
how does the SAM pathway work
sympathetic nervous system triggers fight or flight response so adrenaline and noradrenaline can communicate with organs
what happens during the alarm reaction in GAS
1) amygdala sends distress signal to hypothalamus
2) hypothalamus activates SAM pathway triggering adrenal glands
3) adrenaline and noradrenaline in bloodstream
what happens during resistance in GAS
body adapts to stressor but uses up lots of resources, lowering immune system
what happens during exhaustion in GAS
re-experience adrenaline causing more stress, damaging adrenal glands so less protein produced
what was seyles study
injected rats daily to see stress response
what did seyle find
after several months of stress, raths had psychological symptoms such as stomach ulcers. and over time has more serious problems.
also when in other stressful situations, had similar response ~ showing GAS
what is immunosuppression
stress causes illness preventing the immune system from working efficiently and destroying germs and pathogens
what is a cardiovascular disorder
any disorder affecting heart or blood vessels
what was glasers study
75 medical students blood test 1 month before and during exams to measure natural killer cell activity. also done questionaire on stressors and loneliness