Biology for IGCSE & O level - Human Nutrition (Section 4 - No. 26)
Which of the following is/are true about peristalsis?
It involves waves of muscular contractions.
It occurs only in the oesophagus.
It is responsible for the movement of food through the digestive tract.
It is initiated by the action of enzymes on the food.
Explanation
Peristalsis is a wave-like muscular contraction occurring throughout the digestive tract, propelling food forward. Enzymes don't initiate it.
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