Use the diagram of an action potential to answer the following questions.

-The action potential shown corresponds to which portion of an electrocardiogram (ECG)?

Question

Use the diagram of an action potential to answer the following questions.
 
-The action potential shown corresponds to which portion of an electrocardiogram (ECG)?

Quizplus · Accepted Answer

[Chapter 3, III A 4; Figure 3.3]. The action potential shown represents both depolarization and repolarization of a ventricular muscle cell. Therefore, on an electrocardiogram (ECG), it corresponds to the period of depolarization (beginning with the $\mathrm{Q}$ wave) through repolarization (completion of the $\mathrm{T}$ wave). That period is defined as the QT interval.

Use the Diagram of an Action Potential to Answer the Following