Retropulsion occurs because
A) the fundus prevents the chyme from passing into the narrow pyloric sphincter
B) mostly the large food particles slow down the peristaltic movement in the fundus
C) the chemoreceptors and the stomach receptors are inactivated in the presence of food particles
D) the peristaltic waves of the body of the stomach constrict the antrum
E) most food particles in the stomach initially are too large to fit through the narrow pyloric sphincter
Correct Answer:
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