PHYSIOLOGY
BLOOD PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Autonomic Nervous
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Intrinsic Conduction
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Somatic Nervous
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None of the above
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Detailed explanation-1: -The intrinsic conduction system sets the basic rhythm of the beating heart by generating impulses which stimulate the heart to contract.
Detailed explanation-2: -The intrinsic conduction system of the heart is comprised of several specialized subpopulations of cells that either spontaneously generate electrical activity (pacemaker cells), or preferentially conduct this excitation throughout the four chambers of the heart in a coordinated fashion.
Detailed explanation-3: -The Sinoatrial node (SA) sets the heart rate. It is the “pacemaker” because its fastest ability to auto-depolarize and repolarize makes it the first to initiating each normal heart beat. It is believed that initial SA node action potential propagates from a small group of cells near the center of the SA node.