1
Q
What does the P wave show?
A
Atrial depolarization (atria contracting).
2
Q
What does the QRS complex show?
A
Ventricular depolarization (ventricles contracting).
3
Q
What does the T wave show?
A
Ventricular repolarization (ventricles relaxing).
4
Q
What does the PR interval show?
A
The time taken for the electrical impulse to travel from the atria through the AV node to the ventricles.
5
Q
What does the ST segment show on a electrocardiogram?
A
The period between ventricular depolarization and repolarization (normally flat; deviations can indicate heart problems).
6
Q
What does the QT interval show?
A
Total time for ventricular depolarization and repolarization.
7
Q
A
Unit 5 - Biology
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