| Term | Definition |
|---|
| Pacemaker | The heart contains two types of myocytes: normal cells and _____ cells. |
| Automaticity | Pacemaker cells possess _____, the ability to depolarize rhythmically (spontaneous action potentials). |
| Sinoatrial, Atrioventrical, His, Branches, Purkinje | Pacemaker cells are found in the _____ node, _____ node, bundle of _____, bundle _____, and _____ fibers. |
| Automaticity | In pathologic conditions, non-pacemaker cells can acquire _____ thereby acting as pacemaker cells. |
| False | All pacemaker cells (AV node, SA node, Bundle of His, Bundle Branches, Purkinje Fibers) have the same intrinsic firing rate. (True/False) |
| Fastest | The pacemaker cells with the (Fastest/Slowest) firing rate sets the heart rate. |
| Native, Latent | _____ pacemaker cells set the heart rate. _____ pacemaker cells' intrinsic rhythm is overridden. (Latent/Native) |
| Overdrive Suppression | The mechanism by which SA node cells override the intrinsic firing rates of other pacemaker cells is called _____ _____. |
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