Re: True/False for Autonomic Nervous System

Comments:
: : : 1. The sympathetic nervous system has preganglionic cell bodies at spinal : : levels from T1 to S5. : : False..to L2/3 : Agreed. beginning at T1 : : : 2. The autonomic nervous syetem, by traditional definition, is a two motor neuron efferent system. : : False : This is true. see related post. The somatic motor system is one neuron. : : : 3. The sympathetic nervous system has preganglionic cell bodies in the lateral horn (intermediolateral cell column - IMLCC) at spinal levels S2-4. : : False...T1 to L2/3 : Agreed. See related post. : : : 4. Parasympathetic activity increases intestinal motility and decreases heart rate (bradycardia). : : True... : Agreed. See related post. : : : 5. In general, the parasympathetic postganglionic fibers are longer than sympathetic postganglionic fibers. : : False...reverse is true : Agreed. See related post. : : : 6. The thoracic sympathetic trunk ganglia can be reasonably likened to a 5 legged spider. : : ? : Agreed. See related post. : : : 7. The rami comumicantes branch from the anterior aspect of a sympathetic trunk ganglion. : : ?...connects spinal nerve and sympathetic trunk : Correct about connection. See related post. : : : 8. The splanchnic nerves branch from the anterior aspect of a sympathetic trunk ganglion. : : True...from prevertebral ganglia : Splanchnic nerves branch from sympathetic trunk ganglia - paravertebral ganglia. : : : 9. The spinal nerves are posterior to the sympathetic trunk. : : True...must pass through white rami communicans : See related post. Spinal nerves do not pass through a ramus communican. The reverse might be said but this is dicey. A ramus is an anatomical structure; the fibers from a ramus may "pass through." : : : 10. The greater splanchnic nerve carries preganglionic fibers from the IMLCC of spinal levels T5-9. : : False...it is part of sympathetic which arises from T1 to L2/3 : This is true. : : : 11. The white ramus of a ramus communican has its cell body in the IMLCC. : : True : See related post. This is a poorly worded question but good enough. : : : 12. The grey ramus of a ramus communican has its cell body in a sympathetic trunk gangion. : : True : Agreed. See related post. : : : 13. The sympathetic nervous system contributes thermoregulation by modulating vasoconstriction and to coronary arterial perfusion by vasodilation. : : True : Agreed. See related post. : : : 14. The passing of intestinal gas in an elevator requires an concerted effort on the part of the parasympathetic nervous system driving intestinal movements and the somatic nervous system providing tone to the external anal sphincter. : : True : Agreed. : : : 15. Thus, although the autonomic nervous system is involuntary, the voluntary nervous system (somatic) has some oversight. : : True...some : Agreed.

Link URL:  
Link Title:
Image URL: