CARDIAC - Test Bank Questions



Chapter 11 >>>

Which of the following structures is the primary pacemaker of the heart?

a.

Ventricular tissue

c.

Sinoatrial node

b.

Atrioventricular node

d.

Purkinje fibers >>> ANS: C

With an intrinsic rate of 60 to 100 beats/min, the sinoatrial node is the primary pacemaker in a healthy heart. The atrioventricular node beats 40 to 60 beats/min. Ventricular tissue must have an electrical impulse to contract. Purkinje fibers beat 1...