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14 Cards in this Set
- Front
- Back
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What's the definition of a capacitor?
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Separation of charge by time and space.
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Write out the Nernst Equation:
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Eq Potential = 61.5*log([inside] / [outside])
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What would the net potential across a membrane be if NO channels were present?
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The membrane potential would be zero.
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What is responsible for Phase Four of the cycle?
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Potassium current is responsible for phase four.
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What is responsible for Phase Zero of the cycle?
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Sodium influx is responsible for Phase Zero of the cycle
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What is responsible for Phase One of the cycle?
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Potassium efflux is responsible for Phase One of the cycle.
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What is responsible for Phase Two of the cycle?
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Calcium influx is responsible for Phase Two of the cycle.
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What is responsible for Phase Three of the cycle?
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Potassium efflux is responsible for Phase Three of the cycle.
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Depolarization of what structure is responsible for a P-Wave on an EKG?
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Depolarization of the Atria makes up the P wave.
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In what direction does depolarization run inside the heart?
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Depolarization runs from the inside out.
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In what direction does repolarization run inside the heart?
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Repolarization runs from the outside in.
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If a depolarization approaches a positive electrode, what direction does the needle deflect?
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Positive.
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Can an EKG detect unchanging voltages within the heart?
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No. Only moving current may be detected by an EKG.
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What is single downward deflection (where a QRS might be) called?
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It's called a QS wave
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