describe Selyes General Adaptation SYndrome (6marks)
selye 1956 proposed that in animals and humans, the body responds to a range of psychological and physical stressors. they follow the same physicalogical pattern of stress response. he called this pattern the General Adaptation SYndrome or GAS.
GAS has 3 stages: the first stage is alarm, where any stressful event is registered , this can be from the outside or any physical stress such as an injury or illness. the hypothalamus pituitary gland secretes a surge of atch, which in turn releases corticosteroids from the adrenal cortex. while the sympathetic ANS activates and leads to increased adrenaline and noradrenaline from the adrenal medulla.
the energy expendenture is ready, the second stage is resistance, where the body can now apparently cope with the stressor
the third stage is exhaution, where if the stressor is chronic or long lasting, this is a bad sign as hormone reserves are induced and this may lead to stress related illness.
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