Question

Antagonist is a drug which _______

• A. Activates receptor
• B. Blocks receptor response
• C. Increases absorption
• D. Stimulates metabolism

Hint:

Agonist activates receptor, while antagonist blocks receptor response.

Answer 1

The Correct Option is B

Concept:
Drugs act by interacting with receptors. Some drugs activate receptors, while some drugs block receptors.

Step 1: An agonist binds to a receptor and produces a response.

Step 2: An antagonist binds to a receptor but does not activate it.

Step 3: It prevents the agonist or natural ligand from producing its effect.

Step 4: Thus, an antagonist blocks receptor response.

Step 5: Therefore, the correct answer is blocks receptor response. \[ \boxed{\text{Blocks receptor response}} \]