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Autorhythmicity is a unique feature of cardiac pacemaker cells. What feature of cardiac pacemaker cells allows them to be autorhythmic while other cardiac cells are not?
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18. The Heart
Cardiac Action Potentials
Indietro18. The Heart
Cardiac Action Potentials
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Calcium ion channels open in response to changes in membrane potential. What type of opening mechanism do calcium ion channels in cardiac muscle exhibit?
1470views20rank - Scelta multiplaWhich of the following would increase cardiac output to the greatest extent?255views
- Scelta multiplaWhich part of the heart's electrical conduction system is responsible for initiating the heartbeat?527views
- Scelta multiplaWhat change would lead to an increase in cardiac output during exercise?395views
- Scelta multiplaWhich electrolyte is most directly responsible for triggering cardiac muscle contraction by entering the cell and initiating calcium-induced calcium release?68views
- Scelta multiplaWhich method should a nurse use to assess a client for a pulse rate deficit?446views
- Scelta multiplaWhich feature is characteristic of an action potential at the SA node?478views1rank
- Scelta multiplaHow do you calculate cardiac output?353views
- Scelta multiplaVentricular depolarization is represented by which of the following on an electrocardiogram (ECG)?207views
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How would you expect the absolute refractory period of a contractile cell to change if more potassium channels opened sooner after polarization?
1300views13rank - Scelta multiplaWhich two values are required to calculate cardiac output (CO) for a ventricle?197views
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Cardiac contractile tissue uses sodium, calcium, and potassium channels for depolarization and repolarization. During which phase of the action potential is the calcium channel open?
1557views24rank1comments - Scelta multipla
The movement of ions in opposite directions at the same time is responsible for which of the following?
1184views17rank - Scelta multiplaThe noncontractile cardiac muscle cells that initiate their own depolarization and cause depolarization of the rest of the heart are called __________.1832views2rank