ap5
TRANSCRIPT
Cardiac conduction
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
SA (sinoatrial) node and AV (atrioventricular) node are the heart’s pacemakers
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
Some ions in the body
H+Ca 2+K+Na+
Depolarization
Inside of the cell becomes less electronegative (less negatively charged)