NROC61H3 Lecture Notes - Lecture 10: Functional Magnetic Resonance Imaging, B Cell, Natural Killer Cell
Document Summary
Nroc61 lecture 10 - stress and arousal. There are 2 forms of stresses, 1. acute and 2. chronic. There is a strong link between stress and illness which we will talk about. Your body"s response to any change/event that either disrupts, or threatens to disrupt homeostasis to an unusual degree. Two types of stressors: acute stressors: extreme heat/cold; blood volume depletion by heavy bleeding, dehydration; hypoglycaemia; pain; surgical procedures; toxins from a bacterial infection; severe exercise; sleep deprivation; stress that causes a fear reaction. Something that lasts a very short period of time: chronic stressors: chronic pain, chronic infection; housing problems, marital problems, Stress response system is the body"s natural, adaptive survival system ght or ight response. The important thing is that this is a very selective diversion of energy and blood supply from non-relevant functions to organs that really need the blood supply in order to respond to the stressful limit.
