Which type of laxative causes peristalsis by irritating the bowel?
Stool softener
Saline/osmotic laxative
Stimulant laxative
Bulk-forming laxative
The Correct Answer is C
A) Stool softener:
Stool softeners, such as docusate sodium, work by adding moisture to the stool, making it softer and easier to pass. They do not directly stimulate bowel movements or peristalsis through irritation of the bowel lining.
B) Saline/osmotic laxative:
Saline or osmotic laxatives, such as magnesium hydroxide (milk of magnesia) and polyethylene glycol (PEG), work by drawing water into the intestines, which softens the stool and increases bowel motility. They do not primarily act by irritating the bowel lining.
C) Stimulant laxative.
Stimulant laxatives work by directly stimulating the nerves in the intestines, which increases the rhythmic contractions of the intestines (peristalsis) and promotes bowel movements. These medications irritate the bowel lining, leading to increased motility and expulsion of stool. Examples of stimulant laxatives include bisacodyl and senna.
D) Bulk-forming laxative:
Bulk-forming laxatives, such as psyllium and methylcellulose, work by increasing the bulk and water content of the stool, which stimulates bowel movements. They do not directly irritate the bowel lining to promote peristalsis. Instead, they absorb water and swell in the intestines, creating a larger, softer stool that is easier to pass.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Decreased cardiac output: Inotropic medications are intended to improve cardiac function and increase cardiac output, so monitoring for signs of decreased cardiac output would be contrary to the expected therapeutic effect of these medications.
B. Increased afterload: Inotropic medications primarily affect the contractility of the heart muscle and do not typically have a direct effect on afterload (the force against which the heart must pump blood). While changes in afterload can occur as a secondary consequence of altered cardiac function, monitoring for signs of increased afterload would not be the primary focus after administering an inotropic medication.
C. Increased cardiac output.
Inotropic medications are drugs that affect the contractility of the heart muscle. They are often used in the management of shock to improve cardiac function and increase cardiac output. Therefore, after administering an inotropic medication, the nurse would monitor the patient for signs of increased cardiac output, such as improved peripheral perfusion, increased blood pressure, and resolution of signs and symptoms of shock.
D. Slowing of the heart rate: Inotropic medications can affect heart rate indirectly by altering cardiac output, but their primary effect is on contractility rather than heart rate. Monitoring for signs of bradycardia (slowing of the heart rate) may be appropriate in certain clinical situations, but it is not the primary consideration after administering an inotropic medication for shock.
Correct Answer is D
Explanation
A) Montelukast:
Montelukast is a leukotriene receptor antagonist (LTRA) used as a controller or maintenance medication for asthma. It is not used for the immediate relief of asthma symptoms during an acute attack. Montelukast is taken regularly to prevent asthma symptoms and reduce the frequency of asthma attacks, but it does not provide rapid relief during an ongoing attack.
B) Fluticasone:
Fluticasone is an inhaled corticosteroid (ICS) used as a controller medication for asthma. It works by reducing airway inflammation and is taken regularly to control asthma symptoms and prevent exacerbations. Fluticasone is not used for the immediate relief of acute asthma symptoms and is not suitable for aborting an ongoing asthma attack.
C) Cromolyn:
Cromolyn is a mast cell stabilizer used as a controller medication for asthma. It helps prevent the release of inflammatory substances that contribute to asthma symptoms. Cromolyn is taken regularly to prevent asthma symptoms and reduce the frequency of asthma attacks but is not used for the immediate relief of acute asthma symptoms like albuterol.
D) Albuterol.
Albuterol is a short-acting beta agonist (SABA) bronchodilator used for the quick relief of asthma symptoms during an acute asthma attack or exacerbation. It works rapidly to relax the smooth muscles in the airways, opening them up and relieving bronchoconstriction, which improves airflow and alleviates symptoms such as wheezing, shortness of breath, and chest tightness. Albuterol is typically administered via inhalation through a metered-dose inhaler (MDI) or a nebulizer.
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