A nurse is teaching a client about a medication that has a receptor with an antagonist effect.
Which information should the nurse include in the teaching?
This medication will not change the effects of normal cellular functions.
This medication can block the usual receptor activity.
This medication will increase the effects of normal cellular functions.
This medication will increase and decrease the effects on normal cellular functions.
The Correct Answer is B
Choice A rationale
This statement is incorrect because an antagonist medication changes the effects of normal cellular functions by blocking receptors.
Choice B rationale
An antagonist medication binds to receptors and blocks the usual receptor activity, preventing the normal action of the endogenous substance.
Choice C rationale
This statement describes an agonist medication, which binds to receptors and increases the effects of normal cellular functions.
Choice D rationale
This statement is incorrect because an antagonist medication does not both increase and decrease the effects on normal cellular functions; it primarily blocks receptor activity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Nifedipine is a calcium channel blocker that is effective in treating hypertension and angina. It works by relaxing the blood vessels, which lowers blood pressure and improves blood flow to the heart, reducing chest pain and hypertension.
Choice B rationale
Digoxin is not typically used to treat hypertension. It is primarily used for heart failure and atrial fibrillation to increase the strength of heart muscle contractions and regulate heart rhythm.
Choice C rationale
Heparin is an anticoagulant used to prevent and treat blood clots. It does not directly treat hypertension or angina and is used for conditions like deep vein thrombosis, pulmonary embolism, and during surgeries to prevent clot formation.
Choice D rationale
Captopril is an ACE inhibitor used to treat hypertension and heart failure. While it is effective for lowering blood pressure, it is not primarily used for treating angina compared to medications like nifedipine or other calcium channel blockers.
Correct Answer is D
Explanation
Choice A rationale
Furosemide is a loop diuretic that acts on the ascending limb of the loop of Henle, not the distal tubule.
Choice B rationale
Spironolactone is a potassium-sparing diuretic that works on the collecting ducts and late distal tubules, not the distal tubule.
Choice C rationale
Mannitol is an osmotic diuretic that acts on the proximal tubule and the descending limb of the loop of Henle, not the distal tubule.
Choice D rationale
Hydrochlorothiazide is a thiazide diuretic that works on the distal convoluted tubule, making it the correct answer.
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