ANP 1105 Study Guide - Midterm Guide: Tachycardia, Autonomic Nervous System, Preganglionic Nerve Fibers
15 Nov 2015
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Adequate levels of vital nutrients within blood. Monitoring and adjustment of heart activity/blood pressure. Receptor afferent pathway > control center efferent pathway > effector. Dry mouth, cold & sweaty skin, dilated pupils. Increased heart rate, deep breathing: promotes blood flow to active skeletal muscles and heart. Dilates bronchioles in lungs: increases air flow & oxygen delivery to cells. Stimulates liver: releases glucose into blood & accommodates increased energy need of cells. Post- (except ones serving sweat glands): ne (adrenergic fibers) Blood vessels entirely innervated by sympathetic fibres: keep blood vessels in continual state of partial constriction. Low blood pressure vasomotor fibers fire more rapidly, constrict. High blood pressure vasomotor fibers fire less rapidly, dilate. Blood shunting via vasodilation or vasoconstriction: dominance of blood vessels. Parasympathetic effects dominate heart & smooth muscles of digestive and urinary tract organs. Slows heart & dictates normal activity levels of digestive & urinary tracts. Can be overridden by sympathetic division during stress.
