Biopsychological model: holds that physical illness is caused by a complex interacion of biological, physiological, and sociocultural factors. Health psychology: concerned with how psychosocial factors relate to the promoion and maintenance of health and with the causaion, prevenion, and treatment of illness. Stress: any circumstances that threaten or are perceived to threaten one"s well-being and that thereby tax one"s coping abiliies. Primary appraisal: is an iniial evaluaion of whether an event is (1) irrelevant to you, (2) relevant but not threatening, or (3) stressful. Secondary appraisal: an evaluaion of your coping resources and opions for dealing with the stress. Acute stressors: threatening events that have a relaively short duraion and clear endpoint. Chronic stressors: threatening events that have a relaively long duraion and no readily apparent ime limit. Frustraion: occurs in any situaion in which the pursuit of some goal is thwarted. Conlict: occurs when two or more incompaible moivaions or behavioural impulses compete for expression.