Question

multiple choice
circle the correct answer.

1. the pr interval is usually (lo 2.6c)

a. 0.06 to 0.10 second.
b. 0.12 to 0.20 second.
c. greater than 0.20 second.
d. less than 0.06 second.

1. what part of the ecg tracing represents the repolarization of the purkinje fibers? (lo 2.6b)

a. t wave
b. pr interval
c. u wave
d. p wave

1. what part of the ecg tracing represents the time from the start of the atrial activity to the start of ventricular activity? (lo 2.6b)

a. qrs complex
b. j point
c. qt interval
d. pr interval

1. what part of the ecg tracing is measured from the end of the s wave to the beginning of the t wave and is normally on the isoelectric line? (lo 2.6b)

a. st segment
b. qt segment
c. u wave
d. qrs complex

1. what wave on the ecg tracing is not always seen and sometimes, when seen, can indicate an electrolyte imbalance? (lo 2.6b)

a. u wave
b. p wave
c. q wave
d. r wave

1. the heart’s ability to create its own electrical impulse is known as (lo 2.5b)

a. conductivity.
b. contractility.
c. automaticity.
d. excitability.

Explanation:

Answer:

1. b. 0.12 to 0.20 second
2. a. T wave
3. d. PR interval
4. a. ST segment
5. a. U wave
6. c. automaticity