How do antiplatelet medications work?
Stimulate the plasmin system.
Alter the formation of the platelet plug.
Initiate the clotting cascade.
Interfere with the clotting cascade.
The Correct Answer is B
Choice A rationale
Antiplatelets do not stimulate the plasmin system, which is involved in breaking down clots.
Choice B rationale
Antiplatelet medications work by altering the formation of the platelet plug, preventing platelets from clumping together.
Choice C rationale
They do not initiate the clotting cascade, which is a separate process from platelet aggregation.
Choice D rationale
They do not interfere with the clotting cascade directly but affect platelet aggregation. .
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Treatment of narcotic dependence involves using a narcotics antagonist to block the effects of narcotics. This helps prevent relapse in patients recovering from narcotic addiction by decreasing cravings and withdrawal symptoms.
Choice B rationale
Treatment of alcohol dependence does not typically involve narcotics antagonists. Instead, medications like disulfiram or naltrexone are used to manage alcohol dependence.
Choice C rationale
Reversal of tachycardia is not an indication for a narcotics antagonist. Tachycardia is usually managed with medications like beta-blockers or calcium channel blockers.
Choice D rationale
Reversal of bronchoconstriction is not an indicator for narcotics antagonists. Bronchoconstriction is usually treated with bronchodilators such as albuterol or ipratropium.
Correct Answer is D
Explanation
Choice A rationale
Magnesium plays a role in various cellular functions, including enzyme activity and muscle contraction, but it does not directly inactivate troponin to enable actin and myosin interaction.
Choice B rationale
Sodium is essential for action potential generation and nerve impulse transmission but does not directly influence troponin activity or muscle contraction through actin and myosin bridge formation.
Choice C rationale
Potassium is critical for maintaining cellular resting membrane potential and repolarization of cells but does not play a direct role in inactivating troponin to facilitate muscle contraction.
Choice D rationale
Calcium is the electrolyte that inactivates troponin, allowing actin and myosin to form cross-bridges and contract muscle fibers. Calcium binds to troponin, causing a conformational change that exposes binding sites for myosin on actin filaments.
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