FAS And GAS Flashcards
(13 cards)
Who is the father of stress physiology?
Hans Selye
How did Hans Selye develop his theory of stress biology?
He observed similar physiological responses in humans exposed to different stressors while working as a medical student
What are the symptoms of the triad of stress?
Adrenal dilation, thylolymphatic atrophy, gastrointestinal ulcers
Why is the triad of stress significnat
It showed that stress causes a non-specific physiological response disruption homeostasis, regardless of the stressor type
What is homeostasis?
Maintaining internal stability, through feedback mechanisms, regardless of the external environment.
What is an example of homeostasis?
Blood osmolality: behavioural and physiological
What is allostasis? Give an example:
Achieving stability through change by adjusting physiological set points (habituation/adaptation)
Example: Altitude training (acclimitisation)
How does allostasis differ from homeostasis?
Homeostasis maintains constancy; allostasis involves adaptive, anticipatory regulation
What are the three stages of the general adaptation syndrome?
Alarm, resistance, exhaustion
What happens during the alarm stage of the GAS?
Immediate fight-or-flight response; bodies initial reaction to a stressor.
Describe the physiological state during the resistance stage of GAS:
Suppressed immune system, high blood pressure, high glucose levels, memory issues, anxiety, decreased reproduction
How does genetic make up and prior experience affect the GAS response?
They influence how the stressor is perceived and how resilient the individual is to stress.
What is the bodies response in the exhaustion stage?
If the stress persists and the body can no longer sustain heightened state of alertness, it enters the exhaustion stage. (Chronic stress)
Symptoms: depression, immune issues, cardiovascular problems.
