Ch 19 lec

  1. The valve that lies between the right atrium and the right ventricle is the ________________ valve.



    C) tricuspid
  2. Which of the following valves keeps blood from backing up into the left ventricle?



    B) aortic valve
  3. The small patch of heart tissue that depolarizes spontaneously to begin each heartbeat is the



    A) sinoatrial node.
  4. Which of the following is not one of the features of an intercalated disc?A)Purkinje fibers
    B)electrical junctions
    C)mechanical junctions
    D)interdigitating folds
    A)Purkinje fibers
  5. An electrocardiogram is a graphical representation of



    D) atrial and ventricular de- and repolarization.
  6. An enlarged P wave suggests



    D) a problem with atrial depolarization.
  7. The T wave indicates



    C) ventricular repolarization.
  8. The first heart sound heard is the result of



    D) closure of the AV valves.
  9. Atrial pressure is at its highest when



    C) the AV valves are open.
  10. If the time of ventricular filling were increased in duration



    C) the end diastolic volume (EDV) would be greater.
  11. The ____________ collects blood from all other veins draining the myocardium and returns this blood to the right atrium.




    A) coronary sinus
  12. Which of the following is associated with the atria?



    A) pectinate muscles
  13. Myocardial ischemia may cause



    D) angina pectoris.
  14. Of the pathways listed, which correctly describes a route that blood can take in a normal human?




    A) left atrium > bicuspid valve > left ventricle > aortic semilunar valve
  15. This chamber has to work harder than the others, so it has the thickest myocardium.



    C) left ventricle
  16. The vessel just before the circumflex artery in normal circulation is the



    A) anterior interventricular artery.
  17. Which of the following structures allow one cardiac cell to electronically stimulate another by allowing ion flow across the intercalated disk?



    B) gap junctions
  18. The most correct sequence in the cardiac conduction system is




    B) SA node > AV node > AV bundle > bundle branches > Purkinje fibers.
  19. Which of the following is not one of the features of an intercalated disc?A)Purkinje fibers
    B)electrical junctions
    C)mechanical junctions
    D)interdigitating folds
    A)Purkinje fibers
  20. On the electrocardiogram, repolarization of the atria is represented by the




    B) It does not appear on the EKG since it is obscured by the QRS complex.
  21. Which of the following statements is incorrect?



    D) Ventricular contraction begins at the AV valves and progresses downward toward the apex of the heart.
  22. A normal heartbeat of 70–80 beats per minute is referred to as




    B) sinus rhythm.
  23. All of the following are cardiac stimulants except



    D) potassium and calcium ions.
  24. Unlike skeletal muscles, cardiac muscle has this feature.




    E) Calcium ions can come from ECF.
  25. Closure of the AV valves occurs when




    A) ventricular pressure exceeds atrial pressure.
  26. Which of the following is the correct sequence of events occurring in the cardiac cycle?



    A) atrial systole, atrial diastole, ventricular systole, and ventricular diastole
  27. During a normal cardiac cycle which phase has the longest duration?



    A) quiescent period
  28. When the atria begin depolarizing, which of the following is occuring?A)ventricular filling
    B)ventricular ejection
    C)atrial filling
    D)atrial ejection
    C)atrial filling
  29. If the time of ventricular filling were increased in duration



    B) the end diastolic volume (EDV) would be greater.
  30. An effectively three-chambered heart, as in septal defects, can lead to




    B) mixing of oxygenated and deoxygenated blood.
  31. The only vein in the body that carries oxygenated blood.
    pulmonary vein
  32. List in order heart ob blood flow through the heart
    • vena cava, right atrium,
    • tricuspid valve, right ventricle, pulmonary valve, pulmonary trunk,
    • pulmonary arteries, lungs, pulmonary vein, left atrium, mitral valve,
    • left ventricle, aortic valve, aorta
Author
studysuccess
ID
314988
Card Set
Ch 19 lec
Description
Ch 19 lec
Updated