15 BIO 210 The Autonomic Nervous System (1).pptx - Chapter...

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Chapter 15: TheAutonomic NervousSystemAnatomy and Physiology 210
LEARNING OUTCOMES1. Compare and contrast the components of the autonomic andsomatic nervous systems.2. Compare and contrast the sympathetic and parasympatheticdivisions of the autonomic nervous system
EFFERENT SUBDIVISIONSOF PNSTwo subdivisions (based on effectors)SOMATIC MOTOR NERVOUS SYSTEMEffectors are voluntary: skeletal musclesTHE AUTONOMIC NERVOUS SYSTEM (Sympathetic & Parasympathetic)Effectors are involuntary: cardiac muscle, smooth muscle, and glands
AUTONOMIC NERVOUS SYSTEMRegulates involuntaryeffectorsTwo divisionsSYMPATHETIC DIVISIONTHORACOLUMBARNerves of the sympathetic division branch from thoracic spinal nerves(T1‑T12) and from some lumbar spinal nerves (L1‑L4)PARASYMPATHETIC DIVISIONCRANIOSACRALNerves of the parasympathetic division branch from some cranial nerves (III,VII, IX, X, XI) and from some sacral spinal nerves (S2‑S4)
FUNCTIONS OF THE ANSANS regulates autonomic effectorsin ways that maintain homeostasisBoth divisions continually conduct nerve impulses to autonomic effectorsFor example: heart is connected to both divisions- one will cause heart rate toincrease and the other will cause heart rate to decrease

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Term
Spring
Professor
wyatt
Tags
sympathetic division

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