Which of the following is a true statement about the peristalsis?

Which of the following is a true statement about the peristalsis?


A) It occurs when longitudinal muscles oppose the action of transverse muscles.
B) Its rate is consistent throughout the GI tract.
C) It occurs in the small intestine but not at all in the colon.
D) It is caused by alternate tightening and relaxing of the circular and longitudinal muscles in wall of GI tract organs, propelling the food forward


Answer: D) It is caused by alternate tightening and relaxing of the circular and longitudinal muscles in wall of GI tract organs, propelling the food forward


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