What is agent?

Agent is anything capable of producing an effect upon an organism.
adrenergic blocking a. Drug that slows the stimulating effects of sympathetic nerves, epinephrine, norepinephrine, and other adrenergic amines by blocking receptor sites of cells.
alkylating a. Any compound, such as nitrogen mustard, that contains alkyl groups and is toxic to cells; used to treat cancer.
alpha-adrenergic blocking a. α-adrenergic blocking agent; one that blocks alpha
receptors at effector organs.
beta-adrenergic blocking a. β-adrenergic blocking agent; one that blocks beta
receptors at effector organs; e.g., propranolol metoprolol and atenolol.
blocking a. A drug that interferes with the function of the autonomic nervous system
by blocking transmission at a receptor site on a cell surface, a synapse, or a neuromuscular junction.
calcium channel-blocking a. Any of a class of drugs that block the entry of calcium
into cardiac and smooth muscle cells; also slow nerve impulses through heart muscle.
Used to treat hypertension, angina pectoris, and cardiac arrhythmias.
inotropic a.’s A class of drugs that affect the force of muscle contraction, either positively or negatively.

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