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A drug that binds to a receptor and produces a biological response that mimics the response to the endogenous ligand is known as* (A) Agonist (B) Antagonist (C) Functional antagonist (D) Partial agonist (E) Partial antagonist

Question

A drug that binds to a receptor and produces a biological response that mimics the response to the endogenous ligand is known as* (A) Agonist (B) Antagonist (C) Functional antagonist (D) Partial agonist (E) Partial antagonist

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Solution

The correct answer is (A) Agonist. An agonist is a drug that binds to a receptor and produces a biological response that mimics the response to the endogenous ligand. This means it activates the receptor to produce a response. Other options like antagonist, functional antagonist, partial agonist, and partial antagonist have different functions. For example, an antagonist blocks or dampens a biological response, a functional antagonist inhibits the action of an agonist not by competing for a receptor but by changing the shape of the receptor, a partial agonist produces a response but not to its full potential, and a partial antagonist has both agonist and antagonist effects.

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