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1. All of the following are components of the cardiac conduction system except:
c: interatrial septum
2. Which coronoary artery supplies oxygenated blood to the sinoatrial node and the atrioventricular node?
D: right coronary artery
3. Which of the following components of the cardiac conductions system is considered the pacemaker of the heart?
A: sinoatrial node
4. The sinoatrial node is located closest to the:
a: superior vena cava
5. The sinoatrial node normally fires electrical impulses at a rate of:
a: 60 to 100 per minute
6. The bundle has an automatic firing rate of between:
b: 40 to 60 times per minute
7. The pirkinje fibers have an automatic firing rate between:
b: 20 to 40 per minute
8. Which of the following components of the cardiac conduction system delivers the electrical impulse from the sinoatrial node to the atria?
A: internodal tracts
9. Which of the following deliver the electrical impulse from the sinoatrial node to the left atrium?
A: Bachmann's
10. Which of the following components of the cardiac conduction system deliever the electrical impulse to the bundle of His after a 0.10 second delay?
C: atrioventricular node
11. The atrioventricular node is located at the floor of the:
b: right atrium
12. Which of the following componenets of the cardiac conduction system deliver the elctrical impulse from the atrioventricular node to the bundle branches?
C: bundle of His
13. Which of the following components of the cardiac conduction system delivers the electrical impulse from the bundle of His to the ventricles?
D: internodal tracts
14. Which of the following components of the cardiac conduction system delivers the electrical impulse from the bundle branches to the ventricular walls?
D: Purkinje fibers
15. Which of the following terms means the heart can begin and maintain rhythmic activity without the aid of the nervous system?
A: automaticity
16. Which of the following terms means that cardiac muscle can accept and respond to electrical impulses:
b: excitability
17. Which of the following terms means that a cardiac cell is able to transfer an electrical impuses to a neighboring cardiac cell?
C: conductivity
18. which of the following terms means that the heart responds to an electrical impulse by contracting?