15952957
Descrição
FlashCards por Amelia Tuffley, atualizado more than 1 year ago
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Criado por Amelia Tuffley
mais de 5 anos atrás
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| Questão | Responda |
| Pacemaker action potential phases | 4 0 3 |
| Pacemaker action potential phase 4 | Slow leak of Na into cell Increases membrane potential from -60mV to -40mV |
| Pacemaker action potential phase 0 | Voltage-gated Ca2+ channels open Mass influx of Ca2+ Depolarisation to 10mV |
| Pacemaker action potential phase 3 | Voltage-gated K+ channels open K+ leaves cell Repolarisation to -60mV |
| Cardiac myocyte action potential phases | 4 0 1 2 3 |
| Cardiac myocyte action potential Phase 4 | K+ constantly leaving cell to keep membrane potential at -90mV Na2+ and Ca2+ from neighbouring cell flow into cell via gap junctions, bring membrane potential to -70mV |
| Cardiac myocyte action potential Phase 0 | Voltage-gated Na2+ channels open Membrane potential shoots to 20mV |
| Cardiac myocyte action potential Phase 1 | Voltage-gates Na2+ channels close Voltage-gated K+ channels open Repolarises to 5mV |
| Cardiac myocyte action potential Phase 2 | Ca2+ voltage-gates channels open while K+ is leaving the cell Membrane potential remains the same |
| Cardiac myocyte action potential Phase 3 | Ca2+ channels suddenly close K continues to exit cell Repolarises to -90mV |
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