What is diarrhea?

What is diarrhea?

• A. Increase motility
• B. Decrease motility
• C. Inflammation
• D. Bleeding

Answer: (A)

Diarrhea is best understood as rapid intestinal transit that leaves little time for water and electrolyte absorption, producing loose or watery stools. When the bowel muscles contract more often or with greater speed, chyme moves quickly through the gut, especially the colon, so water isn’t reabsorbed efficiently. This increased motility is the primary mechanism behind diarrhea. Inflammation or bleeding can accompany diarrhea but are not the defining feature, and decreased motility would lead to constipation rather than diarrhea.

Diarrhea is best understood as rapid intestinal transit that leaves little time for water and electrolyte absorption, producing loose or watery stools. When the bowel muscles contract more often or with greater speed, chyme moves quickly through the gut, especially the colon, so water isn’t reabsorbed efficiently. This increased motility is the primary mechanism behind diarrhea. Inflammation or bleeding can accompany diarrhea but are not the defining feature, and decreased motility would lead to constipation rather than diarrhea.