A pacemaker is one that influences the | vedclass

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(B) The pacemaker,specifically the $Sinoatrial$ $(SA)$ node,is a specialized cluster of cells located in the wall of the right atrium of the heart.It

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Heart beat

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(B) The pacemaker,specifically the $Sinoatrial$ $(SA)$ node,is a specialized cluster of cells located in the wall of the right atrium of the heart.It acts as the natural pacemaker because it has the ability to generate electrical impulses spontaneously.These impulses spread through the heart muscle,causing it to contract and relax in a rhythmic manner,which directly regulates the heart beat.Therefore,the pacemaker is responsible for initiating and controlling the rate of the heart beat.

$A$ pacemaker is one that influences the

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