THORAX ABDOMEN AND PELVIS

MEDICAL

DUODENUM JEJUNUM AND ILEUM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Ringlike contractions that slow the movement of chyme through the small intestine by pushing it back and forth.
A
Segmentation
B
Peristalsis
C
Diarrhea
D
None of the above
Explanation: 

Detailed explanation-1: -Segmentation, which occurs mainly in the small intestine, consists of localized contractions of circular muscle of the GI tract. These contractions isolate small sections of the intestine, moving their contents back and forth while continuously subdividing, breaking up, and mixing the contents.

Detailed explanation-2: -Peristalsis is the main function of the muscle layer in the gastrointestinal tract. Segmenting contractions of the inner circular muscles result in ring-like constrictions that aid in mining the ingesta for further digestion and absorption.

Detailed explanation-3: -The intestinal surface itself is arranged into circular folds, which causes the chyme to flow through in a slowed spiral motion, thereby increasing the time available for nutritional absorption to occur.

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