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True or False
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1
The sinoatrial node sets the rhythm of the heart's contractions.
A)True
B)False
2
A resting cardiac cell has a positive charge inside and a negative charge outside.
A)True
B)False
3
Electrodes can be applied directly to dry skin because the skin conducts electricity well.
A)True
B)False
4
Limb electrodes should be placed at different levels on each arm and leg.
A)True
B)False
5
If the source of an interference or artifact on an ECG cannot be determined, disconnect the patient from the electrocardiograph.
A)True
B)False
6
The U wave may be seen in patients who have low potassium levels or other metabolic disturbances.
A)True
B)False
7
Precordial leads are placed on the arms and legs and are bipolar.
A)True
B)False
8
The T wave is the recovery or repolarization of the ventricles.
A)True
B)False
9
Depolarization is the electrical impulse that initiates a chain reaction starting in the SA node and traveling to the ventricles, resulting in contraction.
A)True
B)False
10
Before electrodes are applied, the skin should be cleaned with alcohol-moistened gauze pads and then rubbed vigorously with dry pads to promote better contact between the skin and the electrodes.
A)True
B)False





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