When a competitive antagonist binds to a receptor, the receptor
A) starts the signal transduction pathway
B) initiates production of intermediates that in turn affect cell activity
C) will do nothing
D) directly interacts with cell effector molecules

Question

Quizplus · Accepted Answer

A competitive antagonist will bind to a receptor without activating it, thereby blocking the receptor from being activated by other substances. It does not initiate any cellular response or interact with effector molecules. Therefore, the correct answer is C, which states that the receptor will do nothing when a competitive antagonist binds to it.

When a Competitive Antagonist Binds to a Receptor, the Receptor