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In Contrast to Secondary Esophageal Peristalsis,primary Esophageal Peristalsis Characterized by Which

Question 6

Multiple Choice

In contrast to Secondary esophageal peristalsis,primary esophageal peristalsis characterized by which of the following statements?


A) It does not involve relaxation of The lower esophageal sphincter.
B) It involves only contraction of esophageal smooth muscle.
C) It is not influenced by intrinsic nervous system.
D) It has an oropharyngeal phase.

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