Which of the following describes the action of an agonist?
A molecule that prevents receptor activation by other medications
An endogenous molecule or a medication that can activate a receptor
A medication that increases the affinity of a receptor for a different medication
A therapeutic agent that both blocks and activates a receptor
The Correct Answer is B
An agonist is a molecule that can bind to and activate a receptor to induce a biological response ³. Agonists can be endogenous molecules, such as hormones or neurotransmitters, or medications that mimic the action of endogenous agonists ³.
Option A is incorrect because an agonist does not prevent receptor activation by other medications.
Option C is incorrect because an agonist does not increase the affinity of a receptor for a different medication.
Option D is incorrect because an agonist does not both block and activate a receptor.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Certain foods can interact with medications by inhibiting or inducing cytochrome P450 (CYP) enzymes, which play a crucial role in drug metabolism ¹. This can alter the way the body processes medications and affect their efficacy and safety ¹.
Option A is not correct because not all medications are best absorbed on an empty stomach. Some medications should be taken with food to improve absorption or reduce side effects ¹.
Option B is not correct because client discomfort is not the only concern when it comes to food and medication interactions.
Option C is not correct because foods can also alter the action of medications ¹.
Correct Answer is D
Explanation
Flumazenil is a benzodiazepine antagonist that can be used as an antidote for lorazepam overdose ¹. It works by reversing the effects of benzodiazepines such as lorazepam ¹.
Option A is not correct because naloxone is an opioid antagonist and is not used to treat benzodiazepine overdose.
Option B is not correct because acetylcysteine is used to treat acetaminophen overdose and is not used to treat benzodiazepine overdose.
Option C is not correct because physostigmine is used to treat anticholinergic toxicity and is not used to treat benzodiazepine overdose.
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