Competitive antagonists:

A Decrease maximum response

B Bind reversibly to the receptor, shifting the dose-response curve rightward (higher EC50, same Emax)

C Bind irreversibly

D Increase receptor number

✓ Correct Answer: Option B

Competitive antagonist: can be overcome by increasing agonist concentration. Right shift of curve, Emax unchanged.

💡 Why is B) the correct answer?

The correct answer to the question "Competitive antagonists:" is Option B: Bind reversibly to the receptor, shifting the dose-response curve rightward (higher EC50, same Emax).

The other options — A) Decrease maximum response, C) Bind irreversibly, D) Increase receptor number — are incorrect for this PCAT Exam Prep question. As explained above: Competitive antagonist: can be overcome by increasing agonist concentration. Right shift of curve, Emax unchanged.

📚 About This PCAT Exam Prep Practice Question

This 3-level PCAT Exam Prep question from the Biological Processes topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free PCAT Exam Prep practice test or use flashcards for spaced repetition review.

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Competitive antagonists:

✓ Correct Answer: Option B

📚 About This PCAT Exam Prep Practice Question

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