In Which Situation Would an Injected Drug Be the Most

question 29

Multiple Choice

In which situation would an injected drug be the most effective agonist for an endogenous chemical messenger?

• A)The drug has a lower affinity for the messenger's receptors than the messenger does.
• B)The drug achieves 50% saturation of the messenger's receptors at a lower concentration than that required by the messenger.
• C)The drug does not couple to the binding site of the messenger's receptor.
• D)The drug binds to an alternate binding site on the protein receptor and reduces its affinity for the endogenous chemical messenger.

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