Ch 13 - part 1 Cardiac Conduction System Quiz

The ECG can detect the direction and length of time of a signal, as well as how much ______ was depolarized.

ECG readings are used to detect problems with the ______ activities in the heart.

The ECG records the difference in surface electrical ______ at each electrode in a lead and compares them to one another.

Electrical activity moving towards the positive electrode in the lead will be an upward ______ on the ECG output, and it indicates a depolarization.

If the wave is going towards the negative electrode in the lead, it will manifest as a downward ______ on the ECG reading.

The ECG reflects patterns of action ______ firing throughout all of the cells of the myocardium.

The electrical signal originates at the ______ (SA node).

The signal passes to the ______ node, at the base of the atria.

The signal then passes to the ______ of the heart.

The signal spreads back up through the ______.

The body is primarily filled with ______, and water is a good electrical conductor.

Each electrode is connected to a ______ recording device and arranged in leads.

The ups and downs on the ECG graph represent ______, not contraction.

The P-wave represents the ______ depolarization that happens before contraction.

The QRS complex represents ______ depolarization.

The T-wave is the period of time when the ______ repolarize.

The R-wave is so much larger than the other waves because the ______ walls are very thick and the cells all depolarize together.

The size of the T-wave varies from person to person, but the ______ for the QRS complex or P-waves are similar in amplitude from person to person.