PHYSIOLOGY
BLOOD PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Sinoatrial (SA) Node
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AV node
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Either A or B
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None of the above
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Detailed explanation-1: -For each heartbeat, electrical signals travel through the conduction pathway of your heart. It starts when your sinoatrial (SA) node creates an excitation signal. This electrical signal is like electricity traveling through wires to an appliance in your home.
Detailed explanation-2: -The sinus node continuously generates electrical impulses, thereby setting the normal rhythm and rate in a healthy heart. Hence, the SA node is referred to as the natural pacemaker of the heart.
Detailed explanation-3: -Step 1: Pacemaker Impulse Generation. The first step of cardiac conduction is impulse generation. Step 2: AV Node Impulse Conduction. Step 3: AV Bundle Impulse Conduction. Step 4: Purkinje Fibers Impulse Conduction. 24-Jun-2019