Segmentation refers to the contractions of the small intestine that mix chyme and expose it to the intestinal walls for absorption. It does not occur in the esophagus and is not under voluntary control. While excessive segmentation can impair nutrient absorption, normal levels are necessary for optimal digestion.

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Segmentation

Question 43

Multiple Choice

Segmentation

A) helps mix chyme in the small intestine.
B) occurs in the esophagus,allowing the bolus to travel from the mouth to the stomach.
C) is under voluntary control.
D) results in impaired absorption of nutrients.

Correct Answer: