Lesson 5: Physiological & psychological characteristics of responses to stress
Outcomes (What you need to know and be able to do)Apply a biopsychosocial framework tounderstanding the relationship betweenstress and physical and mental wellbeing: - Explain the physiological and psychological characteristics of responses to stress including fight-flight response, eustress and distress - Explain strengths and limitations of Selyes’ General Adaptation Syndrome
Stress and HealthExposure to stressful situations and events is a common humanexperience. From losing your locker key to losing your job – these eventscan produce stress.Stressor = any person, situation orevent that produces stress.Virtually anything can be a stressorand therefore a cause of stress to anindividual.Stress =A state of physiological andpsychological arousal produced byinternal or external stressors that areperceived by the individual aschallenging or exceeding their abilityto cope.
Responses to StressStress affects different people in differentways – depending on severity, durationand the individual.A Stress Response = physiological (bodily)and psychological (mental) changesexperienced when confronted by astressor.Stress&can&be&classiﬁed&as&MILD,&ACUTE&or&CHRONIC.&Mild&stress&&?&can&be&s@mula@ng&–&low&levels&of&arousal&can&enhance&performance.&Acute&–&sudden&high&arousal&level.&Chronic&–&long&term&–&can&be&damaging.&&
Physiological (Bodily) Responses to Stress 2.#General#Adapta.on#Syndrome#(GAS)#There%are%three%stages%in%the%GAS.%Stage%One:%Alarm%Reac6on:%! Occurs!when!the!person/animal!is!ﬁrst!exposed!to!the!stressor.!!• Body!goes!into!temporary!state!of!‘shock’!–!body!temp!and!blood!pressure! drop.!!• The!body!then!quickly!rebounds!from!this!during!what!is!called! ‘countershock’.!• SympatheCc!NS!is!acCvated!and!a!reacCon!like!that!of!the!ﬂightGﬂight! response!occurs.!Arousal!is!produced!by!the!release!of!hormones!by!the! endocrine!system:!the!pituitary!glands!secrete!ACTH,!which!causes!a! heightened!release!of!adrenaline,!noradrenaline,!and!corCsol!by!the!adrenal! glands!into!the!bloodstream.!!• Organism!is!alert!and!ready.!% The body cannot stay in this state for long without serious consequences. Some organisms in a continuous state of alarm have died within hours or days