A patient asked the nurse what cardiac glycosides do to improve his condition.
What is the nurse's best response?
They increase heart rate.
They decrease the force of myocardial contractions.
They decrease conduction velocity.
They help renal blood flow and increase urine output.
The Correct Answer is D
Choice A rationale
Cardiac glycosides are not known for increasing heart rate. Instead, they tend to decrease heart rate by enhancing vagal tone and increasing the refractory period of the atrioventricular node, which helps in controlling heart rate, especially in atrial fibrillation.
Choice B rationale
Cardiac glycosides actually increase the force of myocardial contractions. They inhibit the sodium-potassium ATPase pump, which leads to an increase in intracellular sodium and calcium levels in the myocardial cells, thus increasing the force of contraction.
Choice C rationale
Cardiac glycosides do not significantly decrease conduction velocity. They primarily affect the contractility and heart rate but their influence on conduction velocity is relatively mild.
Choice D rationale
Cardiac glycosides improve renal blood flow and increase urine output by increasing the cardiac output and reducing the activation of the renin-angiotensin-aldosterone system. This helps in relieving symptoms of heart failure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Serotonin does not compete with anticholinergic agents at muscarinic acetylcholine receptor sites; anticholinergics target these receptors to inhibit the parasympathetic nervous system.
Choice B rationale
Anticholinergics do not increase norepinephrine at the neuromuscular junction.
Choice C rationale
Nicotinic receptors are primarily affected by different classes of drugs, such as neuromuscular blockers.
Choice D rationale
Anticholinergics inhibit the actions of the parasympathetic nervous system by blocking muscarinic receptors, reducing bodily functions like saliva production, digestion, and urination.
Correct Answer is A
Explanation
Choice A rationale
CSF analysis and MRI are crucial in diagnosing multiple sclerosis (MS). CSF may show elevated levels of oligoclonal bands, indicative of immune system activity in the central nervous system. MRI can detect lesions or plaques in the brain and spinal cord, which are characteristic of MS.
Choice B rationale
Serum albumin and CT scan are not standard diagnostic tools for MS. Serum albumin is more relevant to liver function and nutritional status, while CT scans are less sensitive than MRIs in detecting MS lesions.
Choice C rationale
CSF proteins and angiography are not standard tests for diagnosing MS. While CSF protein levels might be altered in MS, angiography is used to visualize blood vessels and is not relevant to MS diagnosis.
Choice D rationale
Serum anti-acetylcholine antibodies and x-rays are not used to diagnose MS. Anti-acetylcholine antibodies are related to myasthenia gravis, and x-rays are not useful for visualizing MS lesions.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.