What role do receptors play in pharmacodynamics?
Medications must bind with receptors to mimic or block the actions of the body's own regulatory molecules.
Activation of the receptor by the medication will cause the cell to develop a new function.
Receptors are necessary to start the process of metabolism of the medication by the liver.
Binding of a medication to a receptor will allow the medication to become more selective to that type of receptor.
The Correct Answer is A
In pharmacodynamics, receptors play a crucial role in mediating the effects of medications ¹. Medications must bind with receptors to mimic or block the actions of the body's own regulatory molecules ¹. This binding can activate or inhibit the receptor, leading to a biological response ¹.
Option B is incorrect because activation of the receptor by the medication does not necessarily cause the cell to develop a new function.
Option C is incorrect because receptors do not start the process of metabolism of the medication by the liver.
Option D is incorrect because binding a medication to a receptor does not necessarily make the medication more selective to that type of receptor.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Anticholinergic medications can be used to treat extrapyramidal symptoms (EPS) such as tremors and shuffling gait that can occur as side effects of first-generation antipsychotics ¹².
Option A is not correct because a direct dopamine antagonist would not be used to treat EPS.
Option B is not correct because increasing the dose of the antipsychotic medication could worsen EPS.
Option C is not correct because withholding the medication for two days could lead to a relapse of the underlying condition being treated by the antipsychotic.
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.
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