CHAPTER 16: THE AUTONOMIC NERVOUS SYSTEM
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1 Unit 4: The Autonomic Nervous System 254 CHAPTER 16: THE AUTONOMIC NERVOUS SYSTEM Read: Chapter 16, pages Read only the topics covered in lecture. We will not cover this chapter in detail. Complete the homework at the end. I. Overview A. Position and Organization in the Nervous System
2 Unit 4: The Autonomic Nervous System 255 B. General Features C. Two Major Branches
3 Unit 4: The Autonomic Nervous System 256 II. Sympathetic Division A. Location of Cell Bodies of Preganglionic Neurons
4 Unit 4: The Autonomic Nervous System 257 B. Preganglionic Fibers - Four Routes Taken by Preganglionic Fibers
5 Unit 4: The Autonomic Nervous System 258
6 Unit 4: The Autonomic Nervous System 259 C. Two Types of Ganglia 1) Sympathetic Chain Ganglia 2) Collateral Ganglia a) celiac b) superior messenteric c) interior messenteric
7 Unit 4: The Autonomic Nervous System 260 D. Postganglionic Fibers E. Effectors
8 Unit 4: The Autonomic Nervous System 261 III. Parasympathetic Division A. Location of Cell Bodies of Preganglionic Neurons B. Preganglionic Fibers C. Ganglia D. Postganglionic Fibers E. Effectors
9 F. Autonomic Nervous System Unit 4: The Autonomic Nervous System 262
10 V. Autonomic Nervous System Receptors Sympathetic pathways: Unit 4: The Autonomic Nervous System 263 Effector Parasympathetic pathways: Effector Receptor Location Response(s) Adrenergic Group " 1 " 2 $ 1 $ 2 Cholinergic Group Nicotinic Muscarinic
11 Unit 4: The Autonomic Nervous System 264 VI. Functions of the Autonomic Nervous System Effector Sympathetic Parasympathetic Heart Smooth Muscle Lungs: bronchioles Skin: arrector pili Pupil: muscles of iris Blood vessels Skin Skeletal muscle
12 Unit 4: The Autonomic Nervous System 265 Viscera Urinary bladder Digestive system Glands Sweat glands Digestive glands Adrenal glands
13 Unit 4: The Autonomic Nervous System 266 ASSIGNMENT: COMPLETE OUT OF CLASS - compare the structure of the sympathetic and parasympathetic divisions of the autonomic nervous system by completing the table below. Sympathetic Parasympathetic Preganglionic neurons a) location of cell bodies and dendrites b) location of axons Ganglia a) Type b) proximity to CNS Postganglionic neurons a) location of cell bodies and dendrites b) location of axons Distribution (limited distribution or widely distributed) Neurotransmitters a) synapse between preganglionic neuron & postganglionic neuron b) synapse between postganglionic neuron & effector Neurotransmitter Receptors a) postganglionic neurons b) viscera
14 ASSIGNMENTS Unit 4: The Autonomic Nervous System 267 Lecture Guide 1) What are the principal components of the autonomic nervous system? What is its general function? What is it called involuntary? What are the two major subdivisions? 2) Distinguish between the preganglionic and postganglionic neurons in the two divisions of the ANS. 3) What is an autonomic ganglion? What happens in a ganglion? Describe the location and function of the three types of autonomic ganglia? 4) How are the structures of the parasympathetic and sympathetic nervous systems similar? Different? 5) Explain how the term dual innervation applies to the autonomic nervous system. 6) Compare the actions of the parasympathetic and sympathetic nervous systems. How do they compare? Do all tissues receive both parasympathetic and sympathetic nerves? 7) Define: cholinergic neuron, adrenergic neuron. Which neurons in the autonomic nervous system are cholinergic? Which neurons are adrenergic? 8) What is meant by the antagonistic effects of the two divisions of the autonomic nervous system? Give some examples. 9) What effect would activation of the sympathetic nervous system have on the following: pupil diameter, hair follicles, adrenal gland, stomach motility, heart rate, passageways of the lungs, sweat production, digestive enzyme secretion. What would the effects of parasympathetic stimulation have on each of these? Textbook Chapter 16 (page ) Level 1 Reviewing Facts and Terms: 1-3, 5, Level 2 Reviewing Concepts: 19, 23, 24 Level 3 Critical Thinking and Clinical Applications: 29 Appendix 1 at the back of the text contains the answers to the above text quetions. Study Guide (pages ) (L1) Multiple Choice: 1-9, 11-13, 15, 17, 19-21, 23 Completion: 2-4, 6-9 Drawing/Illustration: Figures 16.1, 16.2
15 Unit 4: The Autonomic Nervous System 268 (L2) Concept Map I, II Multiple Choice: 2, 5, 8, 10 Completion: 2, 9 Short Essay: 1, 2, 11 (L3) Critical Thinking: 1, 5 Answers to Study Guide questions are located in the back of the Study Guide
16 ILLUSTRATION CREDITS Unit 4: The Autonomic Nervous System 269 This lecture guide is for use in Anatomy & Physiology I (50.173) during the Spring 2006 semester. Materials have been used with permission from the following sources for classroom purposes only. Martini, F. Fundamentals of Anatomy & Physiology 6 th Ed Prentice-Hall, Upper Saddle River, NJ Life Art Clip Art Till, Margaret, Department of Biological and Allied Health Sciences, Bloomsburg University of Pennsylvania Mader, S. Human Biology 7 th Ed. McGraw-Hill Publishing, New York.
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