Which sphincter is composed of skeletal muscle between the anus and external environment?
A) internal anal sphincter
B) lower esophageal sphincter
C) external anal sphincter
D) upper esophageal sphincter
E) sphincter of Oddi
Correct Answer:
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A)pancreas only
B)liver
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A)segmentation
B)haustration
C)accommodation
D)mastication
E)micturition
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