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.
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Related Questions
Correct Answer is A
Explanation
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.
Correct Answer is D
Explanation
A selective serotonin reuptake inhibitor (SSRI) would be chosen as a first-line treatment option over a tricyclic antidepressant (TCA) for several reasons, including reducing the risk of suicide with overdose ³. TCAs have a higher potential for serious or fatal toxicity when taken in large amounts compared to SSRIs ³.
Option A is incorrect because SSRIs can cause sexual dysfunction as a side effect.
Option B is incorrect because both SSRIs and TCAs can cause weight gain and gastrointestinal (GI) effects.
Option C is incorrect because SSRIs can increase the risk of serotonin syndrome when taken with other medications that affect serotonin levels.
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