Which receptor site results in tachycardia,an increased potential for arrhythmias,and an increased cardiac output?

Question

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Stimulation of the beta-1 receptors results in tachycardia,an increased potential for arrhythmias,and an increased cardiac output.In administering drugs to the pulmonary system,stimulation of the beta-1 sites is not desired.However,most respiratory pharmacologic agents have some beta-1 stimulatory effect.

Which Receptor Site Results in Tachycardia,an Increased Potential for Arrhythmias,and