tailieunhanh - Lecture Human anatomy (6/e): Chapter 17 - Martini, Timmons, Tallitsch

Chapter 17 - The nervous system: Autonomic division. The following will be discussed in this chapter: Describe the functions of first-, second-, and third-order neurons; | I HUMAN ANATOMY SIXTH EDITION C h a p t e r 17 MARTINI TIMMONS FA I. LITSCH The Nervous System Autonomic Division PowerPoint Lecture Slides prepared by Jason LaPres North Harris College Houston Texas Copyright 2009 Pearson Education Inc. publishing as Pearson Benjamin Cummings Introduction Routine adjustments in physiological systems are made by the autonomic nervous system ANS . The ANS regulates body temperature and coordinates cardiovascular respiratory digestive excretory and reproductive functions. It adjusts internal water electrolyte nutrient and dissolved-gas concentrations in body fluids outside our conscious awareness. Copyright 2009 Pearson Education Inc. publishing as Pearson Benjamin Cummings A Comparison of the Somatic and Autonomic Nervous Systems The autonomic nervous system differs from the somatic nervous system in the arrangement of the neurons connecting the central nervous system to the effector organs. Visceral motor neurons in the CNS known as preganglionic neurons send their axons called preganglionic fibers to synapse on ganglionic neurons whose cell bodies are located outside the CNS in autonomic ganglia. Axons from the ganglionic neurons are called postganglionic fibers because they carry impulses away from the ganglion. Postganglionic fibers innervate peripheral tissues and organs such as cardiac and smooth muscle adipose tissue and glands. Copyright 2009 Pearson Education Inc. publishing as Pearson Benjamin .

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• Human anatomy
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