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

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Practice Quiz #4

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 repolarization 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 depolarization occurs during the:
a. P wave
b. QRS complex  
c. T wave
d. P-Q interval
e. S-T segment

3. Chordae tendineae:
a. arise from papillary muscles in the ventricles  
b. attach to the undersurface of the semilunar valves
c. get pulled taught immediately prior to ventricular systole
d. remain slack to allow the normal retrograde flow of coronary blood

4. The first heart sound, ‘lub’, 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 greater than the ventricular pressure:
a. the tricuspid atrioventricular valve opens
b. the bicuspid/mitral atrioventricular valve closes
c. the aortic semilunar valve closes  
d. the pulmonary semilunar valve opens

6. Cerebral blood flow is regulated by:
a. skin temperature
b. ADH
c. an intrinsic autoregulatory mechanism  
d. the hypothalamic ‘thermostat’

7. A long-term hypertensive person, whose BP is 200/120 mm Hg, is in risk of developing all of the following changes, EXCEPT:
a. increased workload of the left ventricle
b. increased risk of coronary artery disease
c. increased risk of damage to the blood vessel’s endothelium
d. decreased size of the myocardium  

8. The lowest venous blood pressure is found within:
a. venules
b. medium-sized veins
c. large-sized veins
d. the venae cavae  

9. What is most responsible for propelling blood in the arterial system during cardiac diastole?
a. skeletal muscle contraction and breathing
b. hydrostatic blood pressure arising from ventricular contraction
c. elastic recoil of conducting (elastic) arteries  
d. venous return of blood

10. These structures are the major determinants of vascular resistance (where resistance to blood flow is greatest):
a. arteries
b. arterioles  
c. capillaries
d. venules
e. veins

  
 
 
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