The SA node is the

Normal heart rate

• 50-100 BPM

• 40-80 BPM

• 60-100 BPM

• 70-100 BPM

Electrical impulses originate in the

There is a delay in the transmission of the signal

Depolarization travels toward the heart's apex via ______ and then into left and right ______

The final stop for depolarization is the _____ and carry the impulse into the myocardial tissue

• av node

• bundles of his

• Purkinje fibers

• SA node

The muscular tissue of the heart

• capable of initiating its own impulse if the pathway is broken

• has its automaticity

• can not function on its own

• relies on on the AV node