本题目来源于试卷: Interaction & Interdependence C.6 Integration of Body Systems，类别为 IB生物学
[单选题]
Which of these statements dyfv9 o7zhc qxu 0m5o7p*dm1 ,loes n)l. fg*;mrateup u.i+l l.2o sot relate to peristalsis?
A. Longitudinal muscle and circular muscles work together.
B. Longitudinal muscle prevents the bolus from moving backwards.
C. Longitudinal muscle moves the bolus along the alimentary canal.
D. Bolus is mixed with enzymes.
参考答案: B
本题详细解析:
Explanation: The statement for Choice B is incorrect, because longitudinal muscle does not stop the bolus from moving backwards, this is the role of the circular muscles. Choice A, Choice C and Choice D are correct statements because the longitudinal and circular muscles do work together, longitudinal muscle does move the bolus along the alimentary canal and the bolus is mixed with enzymes as a result of peristalsis.
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