1. The PR interval should normally be _______ seconds or smaller. a. 0.10 c. 0.08 b. 0.12 d. 0.20 2. The QRS interval should normally be _______ seconds or smaller. a. 0.20 c. 0.18 b. 0.12 d. 0.36 3....

1. The PR interval should normally be _______ seconds or smaller.

a. 0.10 c. 0.08

b. 0.12 d. 0.20

2. The QRS interval should normally be _______ seconds or smaller.

a. 0.20 c. 0.18

b. 0.12 d. 0.36

3. The QRS complex is produced when:

a. The ventricles repolarize

b. The ventricles depolarize

c. The ventricles contract

d. Both b and c