Food is moved down the esophagus via what process?
a. Peristalsis
b. Retropulsion
c. Haustral segmentation
d. Defecation
ANS: A
Swallowed food is moved from the esophagus to the stomach by peristalsis, not retropulsion. Haustral segmentation occurs in the small intestine. Defecation is the process of eliminating stool from the rectum.
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