Ch 13-Stress and Health

Ch 13-Stress and Health - Chapter 13-Stress and Health...

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Chapter 13-Stress and Health 1 Useful Definitions Homeostasis : the tendency to maintain a balanced or constant internal state Effector molecules : the molecules in a cascade of neural or hormonal events which ultimately have the most profound effect on the organism An important distinction? Stressor : an object which disrupts the normal balance or equilibrium of an organism. Stressors can be characterized on five domains: o Chronicity o Intensity/severity o Predictability o Controllability o Duration Biological Consequences of Stress Increased arousal and alertness Increased blood pressure Increased energy metabolism Energy conservation- inhibition of auxiliary functions Pain inhibition (analgesia) Altered immune function Irritable bowel syndrome Heart disease Weight Loss/Gain Brain-body pathways in stress. In times of stress, ,the brain sends signals along two pathways. The pathway through the autonomic nervous system controls that release of catecholamine hormones that help mobilize the body for action. The pathway through the pituitary gland and the endocrine system controls the release of corticosteroid hormones that increase energy and ward off tissue inflammation. Biological Responses to Stress
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This note was uploaded on 04/07/2008 for the course PSYC 111 taught by Professor Dr.terrencedeak during the Fall '07 term at Binghamton University.

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Ch 13-Stress and Health - Chapter 13-Stress and Health...

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