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PSYA02H3 (961)
John Bassili (149)

PSYA02 Ch 16

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John Bassili

PSYA02 Ch 16Cultural evolution the adaptive change of a culture to recurrent envt pressures mainly psychological forcesProduct of human intellect and physical capacity Lifestyle the aggregate bhvr of a person they way in which they leads their life Cultural evolution has offered the luxury of diff lifestyle alternatives but also threats and injuries to our health and safety Although the consequences of unhealthy lifestyle bhvrs have obvious negative biological implications the bhvrs themselves can be acqd and maintained by both biological and psychological factors The Law of Effect bhvrs that produce favourable consequences tend to be repeated and those of unfavourable are not repeated eating exercise restBut unhealthy bhvrs have reinforcing consequences in the short run and damaging consequences in the long run enjoy now suffer laterteen smoking Stress a pattern of physiological bhvral and cognitive responses to stimuli real or imagined that are perceived as endangering ones wellbeingProduct of natural selection its a bhvral adaptation that helped our ancestors fight or fleeHelps us confront or escape threatening situations Stressors stimuli that are perceived as endangering ones wellbeing Our physical response to stressors is controlled by the autonomic nervous system which is controlled by the hypothalamus Stress is a biological response that is experienced as an emotion When a stressor is sensed the hypothalamus sends signals to the autonomic nervous system and to the pituitary gland 1 3 rate blood pressure blood sugar levels rise blood vessels constrict blood flow is direct away to major organs 2 Air passages dilate and breathing becomes deep and fast for more air to enter the lungs 3 Digestion stops and perspiration increase4 Adrenal glands secret adrenaline epinephrine which stimulates 3 and other organs Such biological changes are adaptive bc it prepares the body for stressphysical state of alertness and readiness General adaptable syndrome Selye the model to describe the bodys adaptation to chronic exposure to severe stressors The body passes through an orderly sequence of 3 physiological stages alarm arousal of the autonomic nervous system when confronted by the stressor the organisms resistance to the stressor temporarily drops below normal and it experiences shockimpairment of normal physiological functioning resistance w continued exposure of the stressor the autonomic nervous system returns to normaladaptation and exhaustion w contd exposure to the stressor it loses its ability to adapt and resistance plummets to below normal levels leaving the organism susceptible to illness and even death Emotional responses are designed primarily to cope w shortterm events Fightorflight response physiological reactions that help ready us to fight or to run away f a dangerous situation
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