ANATOMY
CHEST AND CARDIOVASCULAR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The SA node is known as the
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gatekeeper
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control center
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pacemaker
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impulse center
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Explanation:
Detailed explanation-1: -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-2: -The delay in conduction of impulse in this node changes the duration of contraction between the atria and the ventricles. Hence AV node is called as the pace-setter.
Detailed explanation-3: -A pacemaker is one or more types of cellular components that, when “implanted or injected into certain regions of the heart", produce specific electrical stimuli that mimic that of the body’s natural pacemaker cells.
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