NURS 3220 Lecture Notes - Lecture 8: Bone Density, Bronchodilator, Thyroid Hormones
Document Summary
Stress (main cause of inflammation: perceived or anticipated threat that disrupts a perso(cid:374)"s well-being or homeostasis, causes: (cid:862)fight or flight respo(cid:374)se(cid:863: hans selye. Work showed physiologic stress involved: enlargement of adrenal gland, decreased lymphocyte levels, development of bleeding ulcers. Concluded physiologic stress impairs ability to resist future stressors. General adaptation syndrome: dr. selye termed this general stress response the general adaptation syndrome (gas, he perceived it as primarily physiologic. Stressor triggers the hypothalamic-pituitary-adrenal (hpa) axis: activates sympathetic nervous system. Arousal of (cid:271)ody defe(cid:374)ses (cid:894)i(cid:374) other (cid:449)ords i(cid:374)fla(cid:373)(cid:373)atio(cid:374)) Liver supplied with blood: convert glycogen to glucose. Return everything to normal (turn down when no longer needed) Pupils return to normal, saliva increased, heart beat back to normal, constrict bronchi, stimulates peristalsis to focus on digestion again, release bile, pee if necessary (bladder control) Begins with the actions of adrenal hormones. Occurs only if stress continues and adaptation is not successful. Some stress is good, motivational for peak performance.
