单词 | antagonist |
释义 | antagonist [an`tag·ǝ´nist] BIOCHEMISTRY A molecule that bears sufficient structural similarity to a second molecule to compete with that molecule for binding sites on a third molecule. PHARMACOLOGY A drug or other chemical substance capable of reducing the physiological activity of another chemical substance; refers especially to a drug that opposes the action of a drug or other chemical substance on the nervous system by combining with and blocking the nerve receptor. PHYSIOLOGY A muscle that contracts with, and limits the action of, another muscle, called an agonist, with which it is paired. |
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