Health and Well-Being (11) Flashcards
Anorexia nervosa
An eating disorder characterised by excessive fear of becoming fat and therefore restricting energy intake to obtain significantly low body weight. Causes a number of serious health problems, particularly loss of bone density. Approx 15-20% die from anorexia of those who have it.
Binge-eating disorder
An eating disorder characterised by binge eating that causes significant distress. Does not involve purging. Tend to be overweight/obese.
Biopsychosocial model
A model of health that integrates biological characteristics (eg. genetic pre-disposition), behavioural factors (eg. lifestyle, stress), and social conditions (eg. cultural influences, social support).
Thoughts and actions affect people’s choices of the environments they interact with. Those environments, in turn, affect the biological underpinnings of thoughts and actions.
Body mass index
BMI; a ratio of body weight to height, used to measure obesity. Does not take age, sex, bone structure, or body fat distribution into account. A clear relationship between BMI and health outcomes does not exist except for the very obese.
Buffering hypothesis
The idea that other people can provide direct emotional support in helping individuals cope with stressful events. When people provide that support (eg. expression of caring, and willingness to listen), the recipient is better able to cope.
Bulimia nervosa
An eating disorder characterised by the alteration of dieting, being eating, and purging. Associated with serious health problems, such as dental and cardiac disorders, but is rarely fatal.
Coping response
Elicited by stress; an attempt to avoid, escape, or minimise the stressor.
Emotion-focused coping
A type of coping in which people try to prevent having an emotional response to a stressor.
Minimising; avoidance, distancing from outcome; engaging in behaviour such as eating or drinking.
Passive strategies, to numb the pain.
Do not solve the problem or prevent it from recurring in the future.
May enable people to continue to function in the face of uncontrollable stressors or high levels of stress.
Fight-or-flight response
The physiological preparedness of animals to deal with dangers by either fighting or fleeing. Proposed by Walter Cannon.
General adaptation syndrome
A consistent pattern of responses to stress; nonspecific stress response; has 3 stages.
- Alarm stage – an emergency action that prepares the body to fight or flee. Physiological responses aimed at boosting physical abilities (cortisol, epinephrine) while reducing activities that make the organism vulnerable to infection. A brief reduction in stress resistance. Immune system kicks in, fights back.
- Resistance stage – the body prepares for longer, sustained defence from the stressor. Immunity to infection and disease increases somewhat as body maximises its defence.
- Exhaustion stage – various physiological and immune systems fail. Body organs that were already weak before the stress are first to fail.
Health psychology
A field that integrates research on health and on psychology; understanding the interrelationship between thoughts (health-related cognitions), actions, and physical and mental health. Involves the application of psychological principles to promote health and well-being.
Hypothalamic-pituitary-adrenal axis
A body system involved in stress responses. The slower-acting response, a complex system of biological events. Helps prepare prolonged response.
- stressful event…interpreted by
- various brain regions
- hypothalamus…sends chemical message to
- pituitary gland…which sends hormones via bloodstream to
- adrenal glands (different region than fast-acting)…which releases
- cortisol…which travels back to various brain regions and the hypothalamus.
Cortisol circulates throughout the body and to various brain areas, especially the hypothalamus, the hippocampus, and the amygdala. It in turn increases the amount of glucose in the bloodstream. Prepares body for response.
Immune system
The body’s mechanism for dealing with invading microorganisms, such as allergens, bacteria, and viruses. Stress interferes with its natural process.
Short term stress boosts the immune system.
Chronic stress weakens it.
Lymphocytes
Specialised white blood cells that make up the immune system.
- B cells; produce antibodies (protein molecules that attach to foreign agents and mark them for destruction).
- T-cells; involved in attacking intruders directly and increasing strength of immune response.
- Natural killer cells; especially potent in killing viruses and also help attack tumours.
Oxytocin
A hormone that is important for mothers in bonding to newborns and may encourage affiliation during social stress. May also encourage social bonding.