NROC61H3 Lecture Notes - Lecture 10: Cardiac Output, Corticosteroid, Protein Catabolism
Document Summary
Stress: stress is your body"s response to changes that disrupt or threaten homeostasis to an unusual agree. Acute stressors: acute stressors divert energy from non-essential tasks so that there"s more energy for the fight/flight response. Importantly, once the stressor is gone, baseline function is returned. In this case, stress can be good as it gives that adrenaline rush to improve performance: increased vigilance and attention. Short-term response (alarm phase: counter-homeostatic response, raised blood pressure, bgl, respiration, cardiac output, short living but immediate, hypothalamus is central to this response stimulate adrenaline release. Inducing hypoxia in rats temporarily allows us to observe this stress response: increase in adrenal output of adrenaline/noradrenaline, rapid decrease of them minates later. Increases circulation to muscles, heart and brain (vasodilation) and vasoconstriction to skin (ie. decrease blood flow to skin: catabolism of fats promoted, glucose is spared for the cns, decreased digestion.
