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Home Q & A Board Biology-Related Homework Help Cell Biology
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7 years ago
The muscularis externa contains which of the following muscle groups?
A) an outer longitudinal layer that requires neural input for contraction
B) a muscularis mucosae, which lubricates as it contracts
C) an inner circular layer capable of slow-wave potentials only
D) both an inner circular and an outer longitudinal layer
E) an inner circular and outer longitudinal layer, and a muscularis mucosae
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