Which type of laxative, as its mechanism of action, pulls water into the fecal mass to create a more watery stool?
1. Bulk-forming laxatives
2. Saline cathartics
3. Surfactant laxatives
4. Stimulant laxatives
Correct Answer: 2
Rationale 1: Bulk-forming agents absorb water, thus adding size to the fecal mass.
Rationale 2: Saline cathartics, also called osmotic laxatives, are poorly absorbed in the intestine. They pull water into the fecal mass to create a more watery stool.
Rationale 3: Surfactants, commonly called stool softeners, cause more water and fat to be absorbed into the stools.
Rationale 4: Stimulant laxatives promote peristalsis by irritating the bowel.
Global Rationale: Saline cathartics, also called osmotic laxatives, are poorly absorbed in the intestine. They pull water into the fecal mass to create a more watery stool. Bulk-forming agents absorb water, thus adding size to the fecal mass. Surfactants, commonly called stool softeners, cause more water and fat to be absorbed into the stools. Stimulant laxatives promote peristalsis by irritating the bowel.
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