Term
| What is the reason that pacemaker cells have an unstable resting membrane potential and are typically maximally repolarized to about -50 mV? |
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Definition
| Its the primary reason that pacemaker cells can fire APs spontaneously |
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Term
| What causes slow response type action potentials to have a slower depolarization phase? |
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Definition
| It is due to the opening of L-type Ca2+ channels |
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Term
| What are responsible for forms of congenital long QT syndrome? |
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Definition
| Defects in the genes for either K+ channel or the structural region of the Na+ channel |
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Term
| What are required for fast propagation of action potentials between myocytes? |
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Definition
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Term
| What is the only point of communication between the atria and ventricles and where is it located? |
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Definition
| The AV node; it is located to the right side of the intra-atrial septum |
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