Involuntary muscle contractions move food through the intestinal tract. The movement that forces the contents back a few inches before pushing it forward again is called:
A) segmentation.
B) rotation.
C) peristalsis.
D) liquefaction.
E) kneading.

Question

Quizplus · Accepted Answer

Segmentation is the process where involuntary muscle contractions in the intestines move the contents back and forth, mixing it with digestive juices. This action does not push the contents in one direction like peristalsis, but rather segments and mixes it, aiding in digestion and absorption.

Involuntary Muscle Contractions Move Food Through the Intestinal Tract