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pharmacology ans

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Pregunta:

Acetylcholine action on heart rate and cardiac output

Autor: Suzuki



Respuesta:

1. Decrease in heart rate and cardiac output: The actions of ACh on the heart mimic the effects of vagal stimulation. For example, if injected intravenously, ACh produces a brief decrease in cardiac rate (negative chronotropy) and stroke volume as a result of a reduction in the rate of firing at the sinoatrial (SA) node. [Note: It should be remembered that normal vagal activity regulates the heart by the release of ACh at the SA node.]


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Suzuki
Suzuki