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

Answer and Explanation

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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Correct Answer is C

Explanation

The nurse would want to have ﬂumazenil readily available in case benzodiazepine reversal is needed. Flumazenil is a medication used to reverse the effects of benzodiazepines such as lorazepam ¹. It can be used to help a person wake up after a medical procedure in which a benzodiazepine was used as a sedative or to treat a benzodiazepine overdose ¹.
Option A is incorrect because physostigmine is not used to reverse the eﬀects of benzodiazepines.
Option B is incorrect because naloxone is used to reverse the effects of opioids, not benzodiazepines.
Option D is incorrect because syrup of ipecac is not used to reverse the eﬀects of benzodiazepines.

A. Reduced hepatic blood ﬂow B. Reduced body fat C. Increased glomerular filtration rate D. Increased gastric motility

Correct Answer is A

Explanation

Reduced hepatic blood flow can decrease the metabolism and excretion of many drugs, requiring that doses of some drugs be decreased ². This can increase the risk of medication toxicity in older adults.
Option B is not correct because reduced body fat is not a physiological change associated with aging.
Option C is not correct because the glomerular filtration rate decreases with age ².
Option D is not correct because gastric motility decreases with age ².

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Which of the following describes the action of an agonist?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A client child accidentally ingested her mother's lorazepam and the child is now very sleepy. Which of these medications would the nurse want to have readily available in case benzodiazepine reversal is needed?

Correct Answer is C

Explanation

An older client may be at higher risk for medication toxicity due to which of the following physiological changes associated with aging?

Correct Answer is A

Explanation

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