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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Alprazolam is a benzodiazepine that is commonly used to treat anxiety disorders and panic disorders ¹. It can also be used as a sleep aid due to its sedative effects ³.
Option A is not correct because paroxetine is an antidepressant and is not commonly used as a sleep aid.
Option B is not correct because buspirone is an anti-anxiety medication and is not commonly used as a sleep aid.
Option D is not correct because amitriptyline is an antidepressant and is not commonly used as a sleep aid.
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.
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