What is one factor in determining whether a drug that readily attaches to a receptor will have agonistic or antagonistic effects?
A) its affinity for the receptor
B) its efficacy
C) the neurotransmitter than normally attaches to that receptor
D) its electrical charge

Question

Quizplus · Accepted Answer

The factor in determining whether a drug that readily attaches to a receptor will have agonistic or antagonistic effects is its efficacy. Efficacy refers to the drug's ability to produce a biological response once bound to the receptor. If the drug has high efficacy, it will produce a response similar to or greater than the natural ligand, resulting in agonistic effects. If the drug has low efficacy, it will produce a weaker or no response, resulting in antagonistic effects. Affinity (A) refers to the drug's ability to bind to the receptor, while the neurotransmitter (C) that normally attaches to the receptor may influence its overall function but is not directly related to whether the drug will have agonistic or antagonistic effects. Electrical charge (D) does not play a significant role in determining a drug's effects on a receptor.

What Is One Factor in Determining Whether a Drug That