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Physiology

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Central Nervous System

Question
1 out of 22
 

Increased vagal tone leads to:



A increased refractory period of atria

B Increased ventricular contractibility

C Increased ectopic beats

D Decreased AV conduction


Ans. D Decreased AV conduction

Stimulation of cholinergic vagal fibers to nodal tissue leads to hyperpolarization of membrane. This action is mediated by muscarinic receptors and result in DECREASE IN RATE OF FIRING OR CONDUCTION.

Central Nervous System Flashcard List

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