Last Modified: December, 2009. (J. Crimando)

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Practice Quiz #5

Choose the best answer to each question. Be sure to answer each question, unanswered question are scored as incorrect. When finished, check your final score by clicking on the "Grade" button at the bottom. There are nine more quizzes at the bottom of the page.

1. On a normal ECG/EKG, atrial depolarization occurs during the:
a. P wave  
b. QRS complex
c. T wave
d. P-Q interval
e. S-T segment

2. On a normal ECG/EKG, ventricular repolarization occurs during the:
a. P wave
b. QRS complex
c. T wave  
d. P-Q interval
e. S-T segment

3. Papillary muscles of the heart:
a. contract to pull the atrioventricular valves shut just prior to systole
b. contract to pull the atrioventricular valves open during diastole
c. contract to hold the atrioventricular valves shut during systole  
d. contract to hold the atrioventricular valves open during systole

4. The second heart sound, ‘dub’, is a valuable aid in diagnosing:
a. semilunar valve dysfunctions  
b. atrioventricular valve dysfunctions
c. ileocecal valve dysfunctions
d. pulmonary trunk wall dysfunctions
e. ascending aortic wall dysfunctions

5. When aortic pressure is less than ventricular pressure, this causes:
a. the tricuspid atrioventricular valve to open
b. the bicuspid/mitral atrioventricular valve to close
c. the aortic semilunar valve to open  
d. the pulmonary semilunar valve to close

6. Which of the following is generally true of veins compared to arteries:
a. veins tend to have smaller diameter lumens than arteries
b. veins tend to run deeper than arteries, closer to bones
c. there tends to be more veins draining blood from a region than arteries supplying blood to that region  
d. there tends to be less blood located in the veins than in the arteries when the body is at rest

7. What is the pulse pressure of a person who has an arterial blood pressure of 160/100 mmHg:
a. 160
b. 100
c. 130
d. 60 

8. Where in the body does blood flow travel the fastest?
a. capillaries
b. cerebral arteries
c. coronary arteries
d. aorta  

9. What is most responsible for propelling blood in the venous system?
a. skeletal muscle contraction and breathing  
b. hydrostatic blood pressure arising from ventricular contraction
c. elastic recoil of large veins
d. increased capillary resistance at the venous end

10. Excessively high heart rate (>180) can reduce cardiac output because:
a. blood is moving too fast through the lungs to pick up enough oxygen
b. it tires out the heart muscles and so they pump slower
c. it reduces the time for ventricular filling which reduces stroke volume  
d. the PR-interval increases which leads to longer ventricular diastole and shorter ventricular systole

  
 
 
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