PHYSIOLOGY
CARDIOVASCULAR PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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AV node, SA node, bundle of His, purkinje fibers
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purkinje fibers, SA node, AV node, bundle of His
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SA node, AV node, bundle of His, purkinje fibers
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None of the above
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Detailed explanation-1: -The SA node starts the sequence by causing the atrial muscles to contract. That’s why doctors sometimes call it the anatomical pacemaker. Next, the signal travels to the AV node, through the bundle of HIS, down the bundle branches, and through the Purkinje fibers, causing the ventricles to contract.
Detailed explanation-2: -The SA (sinoatrial) node generates an electrical signal that causes the upper heart chambers (atria) to contract. The signal then passes through the AV (atrioventricular) node to the lower heart chambers (ventricles), causing them to contract, or pump.
Detailed explanation-3: -The conducting framework of the heart comprises cardiac muscle cells and conducting strands (not apprehensive tissue) that are specialized for starting motivations and conducting them quickly through the heart. They start the ordinary cardiac cycle and coordinate the contractions of cardiac chambers.