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Related Topics
Cards In This Set
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Any deviation from normal rhythm of the heart is called ___
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Dysrhythmia
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No rhythm of the heart is called ______ ,when there is asystole (no beating)
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Arhythmia
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The voltage that exists when the cell membranes of heart muscle are at rest.... what phase number is this?
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Resting Membrane Potential (RMP) / Phase 4
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At RMP, potassium is intracellular or extracellular? Calcium & Sodium...intracellular or extracelluar?
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Potassium is intracellular (the intracellular ion) / Calcium & Sodium are extracellular (extracellular ions)
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The maintanance of the 'polarized state' of ions in the heart muscle cell is done by what pump?
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Sodium-Potassium Adenosine Triphosphatase Pump (ATPase Pump)
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A change in the baseline distribution of ions across the membrane creating an electrical impulse is known as an _______
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Action Potential
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The disruption of the earlier polarized state of the membrane of a heart cell is called _____. Due to what ion? What phase number is this?
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Depolarization / Sodium rushing through Sodium Channels (fast channels) / Phase 0
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A rapid process of repolarization happens during which phases?
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Phases 1,2, and 3
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The interval between phase 0 and phase 4 is called the ______
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Action Potential Duration
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The period between phase 0 and midway through phase 3 is called the absolute or _____. What cannot happen during this period?
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Effective Refractory Period / The cardiac cell cannot be depolarized and generate another action potential
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The period between phase 3 and phase 4 is called the ______. Can another action potential be generated during this period? If so, how?
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Relative Refractory Period / Yes, it must be powerful enough though
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Depolarization occurs when a certain critical voltage is reached called the _______
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Threshhold Potential
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Spontaneous depolarization is also referred to as ____. what happens when this occurs in a place other than the SA node, AV node, or His-Purkinje cells?
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Automaticity / Dysrhythmia occurs
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Which node, SA or AV, is the 'pacemaker' node of the heart?
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SA
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Which node slows the fast moving action potential long enough for the ventricles to fill with blood
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AV node
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