A drug that binds to a receptor, and produces a stimulatory response that is similar to what an endogenous substance would have done if it were bound to the receptor is known as a(n):

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B) An agonist is a drug that binds to a receptor, and produces a stimulatory response that is similar to what an endogenous substance would have done if it were bound to the receptor. For example, adrenaline is an agonist at beta-adrenoceptors. When adrenaline binds to beta-adrenoceptors in the heart, the heart rate increases. Agonists drugs have affinity, which allows them to bind to receptors, as well as high intrinsic activity, which allows them to activate the functions of receptors.

A Drug That Binds to a Receptor, and Produces a Stimulatory