1. The intrinsic firing rate of the Purkinje network is _______ BPM. a. 60–80               c. 20–40 b. 40–60               d. 10–20 2. The SA node receives its blood supply primarily from the: a....

1. The intrinsic firing rate of the Purkinje network is _______ BPM.

a. 60–80               c. 20–40

b. 40–60               d. 10–20

2. The SA node receives its blood supply primarily from the:

a. Left coronary artery

b. Great cardiac vein

c. Right coronary artery

d. Aorta

3. ______ internodal tracts or pathways receive the electrical impulse as it leaves the SA node. These tracts distribute the electrical impulse throughout the atria and transmit the impulse from the SA node to the AV node.

a. Two                   c. Four

b. Three               d. Five