What is the mechanism of action of a stimulant laxative?
Lubricates the intestinal wall and softens stool
Draws water into the bowel to facilitate the passage of feces.
Increases bulk and stimulates peristalsis.
Irritates the intestine directly, promoting peristalsis and evacuation.
The Correct Answer is D
A. Lubricates the intestinal wall and softens stool: This describes the action of lubricant laxatives, such as mineral oil, not stimulant laxatives.
B. Draws water into the bowel to facilitate the passage of feces: This describes osmotic laxatives, such as polyethylene glycol or lactulose.
C. Increases bulk and stimulates peristalsis: This describes bulk-forming laxatives, like psyllium, which absorb water and increase stool size.
D. Irritates the intestine directly, promoting peristalsis and evacuation: This is the correct mechanism for stimulant laxatives, such as bisacodyl and senna. They stimulate the nerve endings in the intestinal lining, leading to increased bowel movement activity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Decrease the potential for thrombus formation: Metoclopramide is not used to prevent thrombus formation; this is typically managed with anticoagulants or other interventions.
B. Prevent postoperative nausea and vomiting: Metoclopramide is a prokinetic agent that helps in increasing gastric motility and is commonly used to prevent or treat nausea and vomiting after surgery.
C. Prolong the effects of anesthesia: Metoclopramide does not affect the duration of anesthesia. It is primarily used for nausea and vomiting.
D. Decrease postoperative pain: Metoclopramide does not have analgesic properties and is not used for pain management postoperatively.
Correct Answer is C
Explanation
A. Mucositis: This refers to painful inflammation and ulceration of the mucous membranes, often without plaques.
B. Canker sores: These are small, shallow ulcers with a yellowish center and red border, not white plaques.
C. Thrush: Thrush is an oral fungal infection (caused by Candida albicans) characterized by white, milk-curd-like plaques on the mucosa.
D. Cold sores: Cold sores are caused by herpes simplex virus and appear as blisters, not white plaques.
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