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6. which term refers to the amount of blood pumped by the heart in 1 minute?

  • cardiac output
  • straling's law of the heart
  • stroke volume
  • inotropic effect

7. an ejection fraction of 30% is:

  • characteristic of a failing heart
  • the amount of oxygenated hemoglobin in the blood in the left ventricle
  • normal
  • characteristic of a healthy person who is engaged in aerobic exercise

8. what is the significance of elevated plasma levels of AST, CPK, and LDH?

  • myocardial damage as in myocardial infraction
  • an increase in coronary blood flow
  • early onset exertional angina
  • a normal myocardial response to exercise

9. decreased blood flow through the coronary arteries is most likely to cause:

  • angina pectoris
  • bradycardia
  • pulmonary edema
  • valve damage

10. what is the term for the sequence of events that occur during one heart beat?

  • cardiac cycle
  • systole
  • cardiac output
  • stroke volume

11. which of the following is not part of the coronary circulation?

  • pulmonary veins
  • circumflex artery
  • left anterior descending artery

12. ventricular systole refers to:

  • the opening of the valves of the ventricles
  • ventricular filling
  • contraction of the ventricular myocardium
  • ventricular depolarisation

13. referring to the ECG, the QRS complex represents ventricular:

  • contraction
  • depolarisation
  • relaxation
  • repolarisation

14. with which of the following is "lubb-dupp" associated?

  • diffusion of O2 from the lungs to the blood in the pulmonary capillaries
  • closing of the heart valves
  • myocardial contraction
  • ventricular depolarisation

15. most of the symptoms of acute left-sided heart failure are:

  • relieved by morphine
  • confined to the lower extremities, as in pedal edema
  • respiratory in nature (e.g., dyspnea, orthopnea)
  • cured by an antibiotic

16. the atrioventricular node (AV node):

  • has a rate that is normally faster than the SA node
  • delays the electrical signal coming from the atria into the ventricles
  • is the pacemaker of the heart
  • is located in the upper part of the right atrium

17. which of the following is a function of a valve?

  • regulates the amount of oxygen bound to hemoglobin
  • regulates heart rate
  • regulates the direction of the flow of blood through the heart
  • directs the movement of the cardiac impulse

18. what happens during ventricular diastole?

  • the ventricles are filling with blood
  • both AV valves are closed
  • all semilunar valves are open
  • blood is pumped to the lungs and systemic circulation

19. which of the following is descriptive of the vagus nerve?

  • fight or flight
  • adrenergic
  • parasympathetic
  • sympathetic

20. heart rate and stroke volume determine:

  • total blood volume
  • hematocrit
  • cardiac output
  • the size of the heart valves