Peristalsis is necessary to make it possible for people to _____ food
a. chew
b. digest
c. swallow
d. smell and taste
C
Peristalsis makes swallowing possible as involuntary movements of circular and longitudinal muscles move food along the esophagus from the mouth to the stomach. Chewing is accom-plished by jaw muscles and is not related to peristalsis. Peristalsis helps move food along the ga-strointestinal tract to the places where digestion of each nutrient takes place, but does not make digestion itself possible. Smell and taste are not related to peristalsis.
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