PSYC 2301 Lecture Notes - Lecture 4: Corticotropin-Releasing Hormone, Sciencedirect, Digestion
Document Summary
Models of stress: fight or flight, general adaptation syndrome, allostasis and allostatic load, cognitive transactional model, alternative models, views of stress. Stressor any event that triggers coping adjustment. Strain psychological and physiological response to a stressor. Changes in the body as stress response": psychological. The physiological reaction of people and animals in response to perceived danger (walter cannon, 1929) Two interrelated systems: sympathetic-andromedullary (sam) system, hypothalamic-pituitary-adrenocortical (hpa) axis. Hypothalamus activity leads to sympathetic arousal, which activates the adrenal medulla to release releases neutrotransmitters called catecholamines (adrenaline and noradrenaline; or epinephrine and norepinephrine) Prepares the body for intense motor activity (fight or flight) Glucocorticoids suppress inflammation & the immune system response over time. Three stages the body uses to respond to stressors: Resistance body resists or adapts to stressor. Initial resistance in response to stressor; system then mobilizes resources to combat stress (i. e. , activates sam) Persisting stress depletes the body"s resources making one unable to effectively cope.
