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In which layer of the GI tract are the smooth muscles located?

a) Mucosa

b) Submucosa

c) Muscularis Externa

d) Serosa
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==Answer==
Answer c. The mucosa contains differentiated cells that are specific to the
function of their location in the GI tract. The submucosa consists of connective
tissue that provides support and flexibility to the GI tract. The Muscularis
Externa consist of Auerbach’s plexus and smooth muscle that aids in peristalsis.
The serosa is the outermost layer of the GI tract and is made up of mostly
connective tissue.
==Notes==
<references />
:This question originally printed in the [http://www.amazon.com/Justin-L.-Lockman/e/B00FLG5AEE/ref=ntt_dp_epwbk_0 Pediatric Anesthesiology Review Topics] kindle book series, and appears courtesy of Naerthwyn Press, LLC.
==Keywords==
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