Posted by Adrian W. on August 14, 2013 at 15:26:40:
In Reply to: True/False for Autonomic Nervous System posted by lae2 on August 14, 2013 at 08:56:29:
1. The sympathetic nervous system has preganglionic cell bodies at spinal levels from T1 to S5.
a. False. The sympathetic nervous system has preganglionic cell bodies from T1 to L2/3
2. The autonomic nervous system, by traditional definition, is a two motor neuron efferent system.
a. True. Preganglionic and postganglionic
3. The sympathetic nervous system has preganglionic cell bodies in the lateral horn (intermediolateral cell column - IMLCC) at spinal levels S2-4.
a. False. They only originate from T1 to L2/3
4. Parasympathetic activity increases intestinal motility and decreases heart rate (bradycardia).
a. True. Rest and digest…and the diagram
5. In general, the parasympathetic postganglionic fibers are longer than sympathetic postganglionic fibers.
a. False. Most parasympathetic synapses happen near or at the organ
6. The thoracic sympathetic trunk ganglia can be reasonably likened to a 5 legged spider.
a. False. Spiders have 8 legs….?
7. The rami comumicantes branch from the anterior aspect of a sympathetic trunk ganglion.
-False. They branch from the posterior aspect of the trunk.
8. The splanchnic nerves branch from the anterior aspect of a sympathetic trunk ganglion.
a. True.
9. The spinal nerves are posterior to the sympathetic trunk.
a. True.
10. The greater splanchnic nerve carries preganglionic fibers from the IMLCC of spinal levels T5-9.
a. True
11. The white ramus of a ramus communican has its cell body in the IMLCC.
-True. It’s the hallway from the IMLCC to the elevator
12. The grey ramus of a ramus communican has its cell body in a sympathetic trunk gangion.
a. True the synapse occurs at the sympathetic trunk
13. The sympathetic nervous system contributes thermoregulation by modulating vasoconstriction and to coronary arterial perfusion by vasodilation.
a. True
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.
a. True
15. Thus, although the autonomic nervous system is involuntary, the voluntary nervous system (somatic) has some oversight.
a. true