Stress And Adaption Flashcards
Stressors
Are tension producing stimuli operating within or on any system
Appraisal
How people interpret the impact of the stressor on themselves or on what is happening in what they are able to do about it
Crisis
When stress overwhelms existing coping mechanisms, patients lose emotional balance, and a crisis results.
Trauma
If the symptoms of stress persist beyond the duration of the stressor, a person has experienced a trauma.
Fight or flight response
Arousal of the sympathetic nervous system, prepares a person for action. Functions through negative feedback.
What structures control the response of the body to a stressor?
The medulla oblongata, The reticular formation, and the pituitary gland
Medulla Oblongata
Located in the lower portion of the brain stem, controls heart rate, blood pressure, and respiration.
Parasympathetic
Decreases
Sympathetic
Increases
Reticular formation
The small cluster of neurons in the brain stem and spinal cord, continuously monitors the physiological status of the body through connections with sensory and motor tracts
Pituitary gland
A small gland immediately behind the hypothalamus. It produces is necessary for adaption to stress, also regulates the secretion of thyroid, gonadal, and parathyroid hormones.
General adaption syndrome (GAS)
Describes how the body response to stressors through the alarm reaction, resistance stage, and exhaustion stage. Is triggered either directly by physical events or indirectly by psychological events. The pituitary gland initiates the GAS.
The General adaption syndrome (GAS) stages;
- Alarm reaction – rising hormone levels result in increased blood volume, blood glucose levels, epinephrine and norepinephrine amounts, heart rate, blood flow to muscles, oxygen intake, and mental alertness, pupils dilate to produce a greater visual field.
- Resistance stage-The body stabilizes. All returns to normal and the body repairs any damage that had occurred.if stress response is chronically activated allostasis occurs. This chronic arousal causes excessive wear and tear and is called allostatic load, which leads to chronic illness.
- Exhaustion stage – occurs when the body is no longer able to resist the effects of the stressor and has depleted the energy necessary to maintain adaption. A person’s addiction to the stressors diminishes.
Allostatic load
Chronic arousal of stress response with the persistence of powerful hormones causes excessive wear and tear on a person
Primary appraisal
Evaluating an event for its personal meaning