Mass movement in the colon is characterized by which process?

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Multiple Choice

Mass movement in the colon is characterized by which process?

Explanation:
Mass movement is a powerful, long-range propulsion of colonic contents toward the rectum, usually triggered after meals by the gastrocolic reflex. The key feature is a strong contraction of the left side of the colon (descending/sigmoid) that sweeps fecal material into the rectum to be expelled. This distinguishes it from the slower, mixing haustral contractions that primarily churn and absorb water in the colon and from processes involving the stomach. It’s not simply a rapid bulking action localized to the sigmoid; it’s a coordinated, sweeping propulsion toward the rectum.

Mass movement is a powerful, long-range propulsion of colonic contents toward the rectum, usually triggered after meals by the gastrocolic reflex. The key feature is a strong contraction of the left side of the colon (descending/sigmoid) that sweeps fecal material into the rectum to be expelled. This distinguishes it from the slower, mixing haustral contractions that primarily churn and absorb water in the colon and from processes involving the stomach. It’s not simply a rapid bulking action localized to the sigmoid; it’s a coordinated, sweeping propulsion toward the rectum.

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