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Title: What effect, β1-adrenergic receptor agonist have on the isolated frog heart? Post by: livestrong136 on May 30, 2014 What effect, if any, do you think that a β1-adrenergic receptor agonist would have on the isolated frog heart?
Title: Re: What effect, β1-adrenergic receptor agonist have on the isolated frog heart? Post by: skip5284 on May 30, 2014 This receptor increases cardiac output by:
1) Increase heart rate in sinoatrial node (SA node) (chronotropic effect) 2) Increase atrial cardiac muscle contractility. (inotropic effect) 3) Increases contractility and automaticity of ventricular cardiac muscle. 4) Increases conduction and automaticity of atrioventricular node (AV node) An antagonist would do the opposite of those listed above, by preventing it from happening. |