Which pathology of autonomic cardiac regulation is mediated by sympathetic innervation?
Increased Ca+ influx with sympathetic stimulation that raises the heart rate.
Sympathetic activation boosts K+ efflux and increases the inotropic effect.
Sympathetic activation decreases dromotrophy by lowering conduction speed.
Increased Na+ influx with sympathetic stimulation reduces pacemaker firing.’
The Correct Answer is A
Choice A: Increased Ca+ influx with sympathetic stimulation that raises the heart rate is a manifestation of sympathetic innervation. Sympathetic activation leads to the release of norepinephrine, which enhances the influx of calcium ions (Ca+) into cardiac muscle cells, resulting in increased contractility and heart rate.
Choice B: Sympathetic activation does increase the inotropic effect (contractility) of the heart, but it is primarily mediated by the increased influx of calcium ions (Ca+).
Choice C: Sympathetic activation does not decrease dromotrophy (conduction speed). Instead, it can increase the conduction speed through the cardiac conduction system.
Choice D: Increased Na+ influx with sympathetic stimulation does not reduce pacemaker firing; instead, it contributes to the enhanced excitability and automaticity of cardiac cells.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["B","D","E"]
Explanation
Choice A: Flavored gelatin can be a choice if the client enjoys it, but it should not be the primary source of nutrition as it lacks protein and other essential nutrients needed for healing.
Choice B: Eggs are a good source of protein, which is essential for tissue repair and healing.
Choice C: Soda crackers are low in protein and do not provide adequate nutrition for postoperative healing.
Choice D: Baked chicken is a lean source of protein and can be a part of a balanced postoperative diet.
Choice E: Salmon is rich in omega-3 fatty acids and protein, which can support the healing process and provide essential nutrients.
Correct Answer is C
Explanation
Choice A: Applying restraints should not be the first approach in fall prevention and is associated with risks and ethical considerations.
Choice B: Accompanying residents during ambulation is a helpful practice but may not be feasible at all times. It's essential to promote independence when possible.
Choice C: Encouraging clients to wear rubber-soled shoes is an important fall prevention measure, as it can provide better traction and stability when walking.
Choice D: Leaving the hall lights on during the night may be helpful, but it is not the most critical intervention for fall prevention. Proper footwear and other measures should take precedence.
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.