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
The statement by the client that indicates an understanding of the medication therapy for Parkinson's disease is that a levodopa/carbidopa combination is used to improve motor function ⁵. Levodopa is converted into dopamine in the brain, helping to control movement ¹. Carbidopa prevents the breakdown of levodopa in the bloodstream so more levodopa can enter the brain ¹.
Option A is incorrect because medication therapy cannot slow the progression of Parkinson's disease.
Option B is incorrect because skipping a dose if the client needs to drive is not recommended.
Option C is incorrect because if dyskinesias occur, the client should not stop the medication immediately without consulting their physician.
Correct Answer is A
Explanation
The nurse would expect the provider to order acetaminophen or ibuprofen for the client. Headache, fever, chills, and muscle aches are common side effects of interferon beta-1a ¹⁴. These side effects are often referred to as flu-like symptoms and can be managed with over-the-counter pain relievers such as acetaminophen or ibuprofen ¹.
Option B is incorrect because an evaluation by a physician may not be necessary if the client is experiencing common side effects of interferon beta-1a.
Option C is incorrect because discontinuing the medication immediately may not be necessary if the client is experiencing common side effects of interferon beta-1a.
Option D is incorrect because checking the hemoglobin may not be necessary if the client is experiencing common side effects of interferon beta-1a.
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