Which statement describes the muscular contractions of the GI tract?
A) Peristalsis begins in the stomach upon the initiation of the swallowing reflex.
B) To withstand the pressure of stool evacuation, the colon must have the thickest and strongest muscles of the GI tract.
C) The jejunum has a third layer of diagonal muscles to enhance contraction and relaxation phases for optimal digestion.
D) The periodic contractions of intestinal muscles mix the chyme before allowing the contents to move toward the colon.
Correct Answer:
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