Sherpath Ch 37 Stress and Coping Flashcards
Distress
stress that does not serve a beneficial purpose) can be accompanied by anxiety and feelings of powerlessness
eustress
stress that serves a beneficial purpose
allostasis
means by which homeostasis is reestablished, and the purpose of allostasis is to assist the body in maintaining stability
Roy’s Adaptation Model
people adapt to stress by:
Meeting their physiologic needs
Developing a positive identity
Performing social role functions
Balancing dependence and independence
General Adaptation Syndrome (GAS)
the body responds in the same way to any demand, whether it be:
Physical or emotional
Pleasant or unpleasant
sympathetic nervous system responds by
raising blood pressure, heart rate, respirations, and cardiac output,
decreasing gastric motility and blood flow to the skin, and
dilating the pupils
Selye’s GAS theory is comprised of three stages
alarm, resistance, and exhaustion
Sympathetic-Adrenal Medulla (SAM)
In SAM, the sympathetic nervous system is activated when vital signs increase. Blood shunts away from the digestive tract and kidneys to the muscles, heart, and lungs. Glucose is dumped in the bloodstream for more energy, pupils dilate to take in stimuli, hearing increases, and oxygen to the brain facilitates cognition. This all happens in a split second, explaining why people can dodge an attack or an oncoming car when the body has perceived a threat.
Hypothalamic-Pituitary-Adrenal (HPA) Axis
As the initial surge of epinephrine subsides, the HPA axis is activated. Nonessential bodily functions are decreased. The intensity of the alarm stage makes it unsustainable for long periods of time. Once the threat has passed, the parasympathetic nervous system allows the body to rest. If the threat does not pass, the next stage (resistance) in the GAS model occurs.
GAS—Resistance and Exhaustion Stages
Resistance: sustained and optimal resistance to the stressor occurs. Usually, stressors are successfully overcome and the body enters a state of recovery, repair, and renewal.
Exhaustion: If stressors are not overcome successfully, the exhaustion stage occurs. The body’s resources are depleted, and stress may become chronic. The toll that long-term increases in cortisol takes on the body can lower immunity and contribute to other types of vulnerability that have significantly detrimental physical effects on the body.