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(B) The cardiac impulse originates in the $SA$ (Sinoatrial) node,which acts as the natural pacemaker of the heart.From the $SA$ node,the impulse sprea

Vedclass · Accepted Answer

$SA$ node $\rightarrow$ $AV$ node $\rightarrow$ Bundle of $His$ $\rightarrow$ Purkinje fibers

Vedclass · Answer

(B) The cardiac impulse originates in the $SA$ (Sinoatrial) node,which acts as the natural pacemaker of the heart.From the $SA$ node,the impulse spreads to the $AV$ (Atrioventricular) node.From the $AV$ node,the impulse travels through the Bundle of $His$ (Atrioventricular bundle).Finally,the impulse is distributed throughout the ventricular musculature by the Purkinje fibers.Therefore,the correct sequence is: $SA$ node $\rightarrow$ $AV$ node $\rightarrow$ Bundle of $His$ $\rightarrow$ Purkinje fibers.

Select the correct pathway for the transmission of cardiac impulses.

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