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Final Exam

QuestionAnswer
All somatic motor neurons release acetylcholine, all preganglionic neurons of the ANS, and the postganglionic parasympathetic nerve axons. True
Autonomic ganglia are sights of synapse and information transmission from preganglionic to postganglionic neurons. True
Autonomic ganglia are motor ganglia containing the cell bodies of motor neurons. True
The autonomic and somatic nervous systems are separate systems that work independently and lack functional overlap. False They work together
The autonomic nervous system may cause activation or inhibition, depending on the active division and the affected target. True
The facial (VII), glossopharyngeal (IX), and vagus (X) nerves contain postganglionic axons of the parasympathetic nervous system. False Preganglionic makes it true
Cranial nerves III (oculomotor), VII (facial), and IX (glossopharyngeal) supply the entire parasympathetic innervation of the head; however, only the preganglionic axons lie within these three pairs of cranial nerves. True
Most autonomic nervous system disorders reflect smooth muscle control abnormalities. True
The effect of beta-blocker drugs (block beta-receptors) is to increase blood pressure False Lowers bloods pressure
Because many of the same cardiac cells are innervated by parasympathetic and sympathetic axons, the influence of the two divisions on the heart is synergistic, meaning contraction is strongest when both divisions act together. False Produced homeostatis
Nicotine stimulates sympathetic effects and causes blood pressure to rise. True
Most blood vessels are innervated by the sympathetic division alone True
Somatic & Visceral reflex arcs are similar, but visceral reflex arcs LACK afferent fibers False They both contain afferent fibers
All splanchnic nerves are sympathetic False
Pelvic splanchnic are parasympathetic True
Created by: srgcrmn
 

 



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