ap5
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Cardiac conduction
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Review
Valves of the heart: Tricuspid, bicuspidPulmonic, Aortic
Conduction: SA node, AV node, bundle of His, Purkinje fibers
Layers of the heart: epicardium, myocardium, endocardium
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SA (sinoatrial) node and AV (atrioventricular) node are the heart’s pacemakers
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Ion
an atom or molecule where the total number of electrons is not equal to the total number of protons.
Thus has an electrical charge
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Some ions in the body
H+Ca 2+K+Na+
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Depolarization
Inside of the cell becomes less electronegative (less negatively charged)
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