Exam2

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1. All of the following are components of the cardiac conduction system except:
- a. sinoatrial node
- b. internodal tracts
- c. interatrial septum
- d. atrioventricular node
- C
2. Which coronary artery supplies oxygenated blood to the sinoatrial node and the atrioventricular
- node?
- a. left main
- b. left anterior descending
- c. circumflex
- d. right coronary artery
- D
3. Which of the following components of the cardiac conduction system is considered the
- pacemaker of the heart?
- a. sinoatrial node
- b. internodal tracts
- c. atrioventricular node
- d. bundle of His
- A
4. The sinoatrial node is located closest to the:
- a. superior vena cava
- b. inferior vena cava
- c. coronary sinus
- d. right coronary artery
- A
5. The sinoatrial node normally fires electrical impulses at a rate of:
- a. 60 to 100 per minute
- b. 40 to 60 per minute
- c. 20 to 40 per minute
- d. 10 to 20 per minute
- A
6. The His bundle has an automatic firing rate of between:
- a. 60 to 100 per minute
- b. 40 to 60 per minute
- c. 20 to 40 per minute
- d. 0 to 10 per minute
- B
7. The Purkinje fibers have an automatic firing rate of between:
- a. 0 to 10 per minute
- b. 20 to 40 per minute
- c. 40 to 60 per minute
- d. 60 to 100 per minute
- B
8. Which of the follow ing components of the cardiac conduction system delivers the electrical
- impulse from the sinoatrial node to the atria?
- a. internodal tracts
- b. atrioventricular node
- c. bundle of His
- d. bundle branches
- A
9. Which of the following deliver the electrical impulse from the sinoatrial node to the left atrii
- a. Bachmann's
- b. Bernoulli's
- c. Wenkebach
- d. His
- A
10. Which of the following components of the cardiac conduction system deliver the electric
- impulse to the bundle of His after a 0.10 second delay?
- a. sinoatrial node
- b. internodal tracts
- c. atrioventricular node
- d. bundle of His
- C
11. The atrioventricular node is located at the floor of the:
- a. left atrium
- b. right atrium
- c. right ventricle
- d. left ventricle
- B
12. Which of the following components of the cardiac conduction system deliver the electrical
- impulse from the atrioventricular node to the bundle branches?
- a. internodal tracts
- b. atrioventricular node
- c. bundle of His
- d. Purkinje fibers
- C
13. Which of the following components of the cardiac conduction system delivers the electrical
- impulse from the bundle of His to the ventricles?
- a. sinoatrial node
- b. internodal tracts
- c. His bundle
- d. right'left bundle branches
- D
14. Which of the following components of the cardiac conduction system delivers the electrical
- impulse from the bundle branches to the ventricular walls?
- a. sinoatrial node
- b. atrioventricular node
- c. bundle of His
- d. Purkinje fibers
- D
15. Which of the following terms means the heart can begin and maintain rhythmic activity without
- the aid of the nervous system?
- a. automaticity
- b. excitabilty
- c. conductivity
- d. contractility
- A
16. Which of the following terms means that cardiac muscle can accept and respond to electrical
- impulses?
- a. automaticity
- b. excitability
- c. conductivity
- d. contractility
- ANS B
17. Which of the following terms means that a cardiac cell is able to transfer an electrical impulse
- to a neighboring cardiac cell?
- a. automaticity
- b. excitability
- c. conductivity
- d. contractility
- C
18. Which of the following terms means that the heart responds to an electrical impulse by-
- contracting?
- a. automaticity
- b. excitability
- c. conductivity
- d. contractility
- D

Author

hoalan

173966

Card Set

Exam2

Description

4A-1

Updated

2012-09-28T00:15:41Z

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