Back to quiz

6. the atrioventricular node (AV node):

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

7. the right ventricle pumps blood to the:

  • pulmonary artery
  • right atrium
  • pulmonary veins
  • aorta

8. 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

9. heart rate and stroke volume determine:

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

10. what happens during ventricular diastole?

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

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

  • relaxation
  • depolarisation
  • repolarisation
  • contraction

12. an ejection fraction of 30% is:

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

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

  • vena cava
  • aorta
  • pulmonary veins
  • pulmonary artery

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

  • adrenergic
  • parasympathetic
  • fight or flight
  • sympathetic

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

  • angina pectoris
  • bradycardia
  • pulmonary edema
  • valve damage

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

  • pulmonary veins
  • circumflex artery
  • left anterior descending artery

17. 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

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

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

19. the purpose of the right heart is to pump blood:

  • into the aorta
  • to the left anterior descending and circumflex arteries
  • to the lungs for oxygen
  • to the systemic circulation

20. which of the following refers to a positive inotropic effect?

  • a slow heart rate
  • a rapid heart rate
  • an increased myocardial contractile force
  • heart attack