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6. which of the following supplies unoxygenated blood to the heart muscle?

  • pulmonary veins
  • pulmonary artery
  • coronary arteries
  • cardiac veins

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

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

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

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

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

  • contraction
  • depolarisation
  • relaxation
  • repolarisation

10. the aorta receives blood from the:

  • left ventricle
  • pulmonary veins
  • right ventricle
  • pulmonary artery

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

  • systole
  • cardiac output
  • cardiac cycle
  • stroke volume

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

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

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

  • pulmonary veins
  • circumflex artery
  • left anterior descending artery

14. where does the cardiac action potential (cardiac impulse) normally originate?

  • SA node
  • etopic focus
  • AV node
  • purkinje fibres

15. a vessel(s) that carry(ies) blood from the pulmonary capillaries to the left atrium is (are) the:

  • vena cava
  • pulmonary veins
  • pulmonary artery
  • aorta

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

  • valve damage
  • angina pectoris
  • pulmonary edema
  • bradycardia

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

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

18. which of the following best indicates why the left ventricular myocardium is thicker than the right ventricular myocardium?

  • left ventricular oxygen saturation is greater in the left ventricular
  • left ventricular volume is less that the right ventricular volume
  • the left ventricular works harder than the right
  • the aortic valve is narrower than the pulmonic valve

19. the atrioventricular node (AV node):

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

20. heart rate and stroke volume determine:

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