CHAPTER 14 AUTONOMIC NERVOUS SYSTEM

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CHAPTER 14AUTONOMIC NERVOUS SYSTEMCopyright 2010 Pearson Education, Inc.

AUTONOMIC NERVOUS SYSTEMOrganizationCopyright 2010 Pearson Education, Inc.

Figure 14.1 Place of the ANS in the structural organization of the nervous system.Central nervous system (CNS)Peripheral nervous system (PNS)Sensory (afferent)divisionCopyright 2010 Pearson Education, Inc.Motor (efferent) divisionSomatic nervoussystemAutonomic nervoussystem (ANS)SympatheticdivisionParasympatheticdivision

AUTONOMIC NERVOUS SYSTEMComparison of Somatic andAutonomic Nervous SystemsCopyright 2010 Pearson Education, Inc.

Figure 14.2 Comparison of somatic and autonomic nervous systems.SOMATICNERVOUSSYSTEMCell bodies in centralnervous systemPeripheral nervous systemNeurotransmitterat effectorEffectororgansSingle neuron from CNS to effector organsEffect AChStimulatoryHeavily myelinated axonSkeletal muscleNESYMPATHETICAChUnmyelinatedpostganglionic axonLightly myelinated GanglionEpinephrine andpreganglionic axonsnorepinephrineAChAdrenal medullaPARASYMPATHETICAUTONOMIC NERVOUS SYSTEMTwo-neuron chain from CNS to effector organsAcetylcholine (ACh)Blood vesselAChAChLightly myelinatedpreganglionic axonNorepinephrine (NE)Copyright 2010 Pearson Education, Inc.Ganglion UnmyelinatedpostganglionicaxonSmooth muscle(e.g., in gut),glands, cardiacmuscleStimulatoryor inhibitory,dependingon neurotransmitterandreceptorson effectororgans

True or false: All autonomic nervous pathwaysinvolve a ganglion.1) True2) FalseCopyright 2010 Pearson Education, Inc.

All preganglionic neurons in the autonomicnervous system use which orepinephrineCan use any of the aboveCopyright 2010 Pearson Education, Inc.

AUTONOMIC NERVOUS SYSTEMSympathetic andParasympathetic Nervous SystemsCopyright 2010 Pearson Education, Inc.

Which of the following is a sympathetic function?1)2)3)4)Increasing blood pressureShunting blood to digestive tractSlowing breathingIncreasing urine outputCopyright 2010 Pearson Education, Inc.

AUTONOMIC NERVOUS SYSTEMAnatomy of Sympathetic andParasympathetic Nervous SystemsCopyright 2010 Pearson Education, Inc.

Figure 14.3 Overview of the subdivisions of the racicPancreasLiverand gallbladderPancreasL1Liver talsGenitalsCopyright 2010 Pearson Education, Inc.Sacral

Figure 14.4 Parasympathetic division of the ANS.CN IIICiliaryganglionCN VIICN IXCN XPterygopalatineganglionSubmandibularganglionOtic d sublingualglandsParotid glandHeartCardiac andpulmonaryplexusesCeliacplexusLungLiver oris, and vagina)Copyright 2010 Pearson Education, erand uretersPreganglionicPostganglionicCranial nerve

Figure 14.6 Sympathetic division of the ANS.EyeLacrimal glandNasal mucosaPonsSympathetic trunk(chain) gangliaBlood vessels;skin (arrector pilimuscles andsweat ionInferiorcervicalganglionT1Salivary glandsHeartCardiac andpulmonaryplexusesLungGreater splanchnic nerveLesser splanchnic nerveCeliac ganglionL2Liver andgallbladderStomachWhite drenal lia (uterus, vagina, andpenis) and urinary bladderCopyright 2010 Pearson Education, Inc.

The craniosacral division of the autonomicnervous system is synonymous with the 1)2)3)4)Afferent nervous systemParasympathetic nervous systemSomatic nervous systemSympathetic nervous systemCopyright 2010 Pearson Education, Inc.

Figure 14.5a Sympathetic trunks and pathways.Spinal cordDorsal rootVentral rootRibSympathetictrunk ganglionSympathetictrunkVentral ramusof spinal nerveGray ramuscommunicansWhite ramuscommunicansThoracicsplanchnic nerves(a) Location of the sympathetic trunkCopyright 2010 Pearson Education, Inc.

Figure 14.5b Sympathetic trunks and pathways (1 of 3).Lateral horn (visceralmotor zone)Skin (arrectorpili musclesand sweatglands)Dorsal rootDorsal root ganglionDorsal ramus ofspinal nerveVentral ramus ofspinal nerveGray ramuscommunicansWhite ramuscommunicansTo effectorVentral rootSympathetictrunk ganglionSympathetic trunk1 Synapse at the same levelBlood vessels(b) Three pathways of sympathetic innervationCopyright 2010 Pearson Education, Inc.

Figure 14.5b Sympathetic trunks and pathways (2 of 3).Skin (arrectorpili musclesand sweatglands)To effectorBlood vessels2 Synapse at a higher or lower level(b) Three pathways of sympathetic innervationCopyright 2010 Pearson Education, Inc.

Figure 14.5b Sympathetic trunks and pathways (3 of 3).Splanchnic nerveCollateral ganglion(such as the celiac)Target organin abdomen(e.g., intestine)3 Synapse in a distant collateral ganglionanterior to the vertebral column(b) Three pathways of sympathetic innervationCopyright 2010 Pearson Education, Inc.

True or false: Ganglia in the sympatheticnervous system are found in effector organs.1) True2) FalseCopyright 2010 Pearson Education, Inc.

AUTONOMIC NERVOUS SYSTEMPhysiology of Sympathetic andParasympathetic Nervous SystemsCopyright 2010 Pearson Education, Inc.

AUTONOMIC NERVOUS SYSTEMNeurotransmitters & receptorsCopyright 2010 Pearson Education, Inc.

Table 14.2 Cholinergic and Adrenergic ReceptorsCopyright 2010 Pearson Education, Inc.

Which of the following are types of inicnicotinic1 and 2 only3 and 4 onlyall of the aboveCopyright 2010 Pearson Education, Inc.

AUTONOMIC NERVOUS SYSTEMEffects of drugsCopyright 2010 Pearson Education, Inc.

Table 14.3 Selected Drug Classes That Influence the Activity of the Autonomic Nervous SystemCopyright 2010 Pearson Education, Inc.

Phenylephrine is what kind of inergicacetylcholinesterase inhibitorCopyright 2010 Pearson Education, Inc.

AUTONOMIC NERVOUS SYSTEMInteractions between divisions:Tone and reflexesCopyright 2010 Pearson Education, Inc.

Figure 14.9 Levels of ANS control.Communication atsubconscious levelCerebral cortex(frontal lobe)Limbic system(emotional input)HypothalamusOverall integrationof ANS, the bossBrain stem(reticular formation, etc.)Regulation of pupil size,respiration, heart, bloodpressure, swallowing, etc.Spinal cordUrination, defecation,erection, and ejaculationreflexesCopyright 2010 Pearson Education, Inc.

True or false: At rest, the sympatheticnervous system is completely “off”1) True2) FalseCopyright 2010 Pearson Education, Inc.

AUTONOMIC NERVOUS SYSTEMHomeostatic imbalancesCopyright 2010 Pearson Education, Inc.

“Beta-blocker” medications (b-adrenergicreceptor blockers) might be useful for whichof the following diseases?1)2)3)4)5)Orthostatic hypotensionHypertensionRaynaud’s disease2 and 3 onlyAll of the aboveCopyright 2010 Pearson Education, Inc.

AUTONOMIC NERVOUS SYSTEMRole of the adrenal medullaCopyright 2010 Pearson Education, Inc.

Which of these chemicals is produced bythe adrenal phrine2 and 3 onlyAll of the aboveCopyright 2010 Pearson Education, Inc.

Table 14.4 Effects of the Parasympathetic and Sympathetic Divisions on Various Organs (1 of 2)Copyright 2010 Pearson Education, Inc.

Table 14.4 Effects of the Parasympathetic and Sympathetic Divisions on Various Organs (2 of 2)Copyright 2010 Pearson Education, Inc.

Figure 14.1 Place of the ANS in the structural organization of the nervous system. Central nervous system (CNS) Peripheral nervous system (PNS) Sensory (afferent) Motor (efferent) division division Somatic nervous system Autonomic nervous system (ANS File Size: 1MB

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