Heart electrical conduction system
[DOC File]14 CHAPTER 14
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The heart’s electrical conduction system controls heart rate and helps to keep the atria and ventricles working together. The mechanical pumping action of the heart can occur only in response to an electrical stimulus. The electrical conduction system consists of the sinoatrial (SA) node, the atrioventricular (AV) node, the bundle of His, the ...
[DOC File]Study Guide # 4
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The autorhythmic cells set the rhythm of electrical excitation that causes contraction of the heart. Conduction system. There is a cycle of cardiac excitation that starts in the right atrium and progresses through the heart, resulting in sequential contracting of the atria and ventricles.
The Conducting System
The electrical events occur first, involving the spreading of the action potential between autorhythmic cells of the intrinsic conduction system. The autorhythmic cells then convey the impulse to the contractile cells of the myocardium, which contract The contraction is the …
[DOC File]The Cardiovascular System
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Two events happen in a heart beat. 1. electrical event which causes: 2. muscular event/contraction. Either event can have problems so doctors need the ability to check each one. The Conduction system. I. Conduction System of the Heart - Know parts on diagram. Cardiac muscle needs organization/rhythm and speed control. for maximum efficiency
Definition of Heart conduction system
The Conducting System. Introduction The heart's conducting system consists of the . sinoatrial node (SA node), atrioventicular node (AV node), the bundle of His, the bundle branches and the Purkinje fibers. The electrical impulse that causes rhythmic contraction of heart muscles arises in the . SA node. which is the intrinsic pacemaker of the ...
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The Heart’s electrical conduction system:-cardiac muscle cells will contract spontaneously even without stimulation from the nervous system-to be efficient, the heart has to have a control system. There are 2 parts to this system: 1. Autonomic nerves-
[DOC File]Cardiac Action Potential ADAM
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The electrical conduction system in the heart coordinates contraction. The APs originate in one part of the strategically located autorhythmic cells and then spreads this signal between cells via gap junctions in intercalated disks. The depolarization of the contractile muscle cells is followed by a wave of muscle contraction that passes across ...
[DOC File]I
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6. Purkinje fibers carry the impulse to the heart apex & ventricular walls. Extrinsic Innervation of the Heart • Heart is stimulated by the sympathetic cardio-acceleratory center • Heart is inhibited by the parasympathetic cardio-inhibitory center. Electrocardiography. Electrical activity is recorded by electrocardiogram (EKG)
[DOC File]The Heart
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Outline the structures of the heart that a RBC would encounter during one circulatory cycle. Name all of the important structures found on the exterior surface of the heart and their roles. What and where are the 4 valves of the heart? What are some disorders of heart valves? Discuss the anatomy of the electrical conduction system of the heart.
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