stress- SAM and PAS 3.0 / 5HideShow resource informationPsychologyStressASAQACreated by: alexCreated on: 28-05-13 23:29 SAM SAM- sympathetic adrenal medullary system is acute (immediate) response to stress Ensures the body is ready to use energy Brain perceives a stressor activales SNS adrenal medulla releases adrenaline. initiates FOFR 1 of 6 FOFR FOFR= Fight or flight response increase heart rate increase blood pressure increase breathing rate strong emotions dilation of pupils decrease of saliva 2 of 6 PAS PAS= Pituitary- Adrenal System PAS is a response to chronic stress (on going stress) Takes upto 20 mins to complete Self regulating system If cortisol levels rises CRF + ACTH production reduces Brain perceives a stressor CRF released into the bloodstream CRF causes Pituitary gland to release ACTH (adrenocorticotrophic hormone) into blood ACTH stimulates adrenal cortex It releases corticosteroides (cortisol) Causes Liver to release glucose into blood leading to production of energy 3 of 6 Consequences of the stress response 1) chronic stress involves repeated episodes of increase heart rate and blood pressure- formation of plague in cardiovascular system 2) Adrenaline and Nor- Adrenaline contributes to increasing in blood cholesterol levels- leads to blood clots and artery walls become thinckened 3) Repeated episodes of FOFR leads to raised heart rate is linked to more rapid build up of cholesterol 4 of 6 Individual differences (Taylor et al) Taylor et al: gender differences Men react to stress with a FOFR whereas women react with a "tend and befriend response" Gender differences seen in many species Women protect and nurture their young (tend) and seek social contact and support from other females (befriend) 5 of 6 Individual differences (oxytocin) High levels of oxytocin is associated with reduced cortisol levels and faster recovery to acute stress response. Male hormones reduce effects of oxytocin Female hormone (oestrogen) amplifies effect of oxytocin 6 of 6
Comments
No comments have yet been made