A patient is using psyllium hydrophilic mucilloid (Metamucil) to promote evacuation of stool. What is the action of this medication?
A) It reduces the surface tension of bowel contents.
B) It irritates the intestinal mucosa, thus increasing intestinal motility.
C) It increases mass and water content of stool, promoting evacuation.
D) It creates a barrier between the colon wall and feces.
C
Feedback:
Bulk-forming laxatives increase mass and water content of the stool, promoting evacuation. Bulk-forming laxatives do not reduce surface tension of bowel contents. Bulk-forming laxatives do not irritate the intestinal mucosa to increase intestinal motility. Bulk-forming laxatives do not create a barrier between the colon wall and feces.
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