A group of nurses are discussing the difference of an agonist verses an antagonist. Which of the following medications may the nurse select as an agonist?
Medications that limit the receptor activity
Medications that block the receptor activity
Medications that change the receptor activity
Medications that activate the receptor activity and are synergistic
The Correct Answer is D
A. Medications that limit the receptor activity: This describes an antagonist, which reduces or limits receptor activity.
B. Medications that block the receptor activity: This also describes an antagonist, which prevents receptor activation.
C. Medications that change the receptor activity: This statement is vague and does not clearly define an agonist.
D. Medications that activate the receptor activity and are synergistic: An agonist binds to a receptor and stimulates a response, often enhancing normal physiological functions.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
B. Liver: Grapefruit juice inhibits CYP3A4 enzymes in the liver, which metabolize many drugs (e.g., statins, calcium channel blockers). This inhibition can lead to increased drug levels and toxicity.
A. Gall bladder – The gall bladder stores bile but does not metabolize drugs.
C. Kidney – The kidneys excrete drugs, but grapefruit juice does not significantly impact renal metabolism.
D. Small bowel – Some drug metabolism occurs in the intestines, but grapefruit juice primarily affects liver enzymes.
Correct Answer is A
Explanation
A. Intravenous: IV administration delivers medication directly into the bloodstream, allowing for the fastest onset of action (within seconds to minutes).
B. Topical patch: Slow absorption, designed for long-term, sustained release.
C. Sublingual: Faster than oral, but slower than IV (absorbed through mucous membranes).
D. Intramuscular: Faster than oral, but slower than IV, as the drug must diffuse into the bloodstream from muscle tissue.
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