Item81 Time Remaining 25 minutes 41 seconds00:25:41Item 81 Time Remaining 25 minutes 41 seconds00:25:41In a normal electrocardiogram (ECG or EKG),Multiple Choicethe T wave represents repolarization of the ventricles.during the P-R interval, the ventricles contract.the P wave results from repolarization of the atria.Both "the QRS complex results from depolarization of the ventricles" and "the T wave represents repolarization of the ventricles" are correct.the QRS complex results from depolarization of the ventricles.
Question
Item81 Time Remaining 25 minutes 41 seconds00:25:41Item 81 Time Remaining 25 minutes 41 seconds00:25:41In a normal electrocardiogram (ECG or EKG),Multiple Choicethe T wave represents repolarization of the ventricles.during the P-R interval, the ventricles contract.the P wave results from repolarization of the atria.Both "the QRS complex results from depolarization of the ventricles" and "the T wave represents repolarization of the ventricles" are correct.the QRS complex results from depolarization of the ventricles.
Solution
The correct answer is "Both 'the QRS complex results from depolarization of the ventricles' and 'the T wave represents repolarization of the ventricles' are correct."
Here's why:
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The QRS complex in an EKG represents the depolarization of the ventricles, which is the process by which the ventricles prepare for contraction. This is correct.
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The T wave in an EKG represents the repolarization of the ventricles, which is the process by which the ventricles reset their electrical state after contraction. This is also correct.
The other options are incorrect because:
- During the P-R interval, the ventricles are actually filling with blood, not contracting.
- The P wave results from depolarization of the atria, not repolarization.
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