Ch 19 lec

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  1. The valve that lies between the right atrium and the right ventricle is the ________________ valve.
    A)tricuspid
    B)mitral
    C)aortic semilunar
    D)bicuspid
    A)tricuspid
    (this multiple choice question has been scrambled)
  2. Which of the following valves keeps blood from backing up into the left ventricle?
    A)aortic valve
    B)tricuspid valve
    C)bicuspid valve
    D)pulmonary valve
    A)aortic valve
    (this multiple choice question has been scrambled)
  3. The small patch of heart tissue that depolarizes spontaneously to begin each heartbeat is the
    A)sinoatrial node.
    B)node of His.
    C)superior cardiac node.
    D)atrioventricular node.
    A)sinoatrial node.
    (this multiple choice question has been scrambled)
  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
    A)atrial depolarization.
    B)atrial and ventricular de- and repolarization.
    C)ventricular depolarization.
    D)both atrial and ventricular depolarization.
    B)atrial and ventricular de- and repolarization.
    (this multiple choice question has been scrambled)
  6. An enlarged P wave suggests
    A)a problem with atrial repolarization.
    B)a problem with atrial depolarization.
    C)a problem with ventricular repolarization.
    D)a problem with ventricular depolarization.
    B)a problem with atrial depolarization.
    (this multiple choice question has been scrambled)
  7. The T wave indicates
    A)atrial depolarization.
    B)atrial repolarization.
    C)ventricular depolarization.
    D)ventricular repolarization.
    D)ventricular repolarization.
    (this multiple choice question has been scrambled)
  8. The first heart sound heard is the result of
    A)opening of the semilunar valve.
    B)opening of the AV valves.
    C)closure of the AV valves.
    D)closure of the semilunar valves.
    C)closure of the AV valves.
    (this multiple choice question has been scrambled)
  9. Atrial pressure is at its highest when
    A)the AV valves are closed.
    B)the semilunar valves are closed.
    C)the AV valves are open.
    D)The valves have no influence on atrial pressure.
    C)the AV valves are open.
    (this multiple choice question has been scrambled)
  10. If the time of ventricular filling were increased in duration
    A)the EDV and ESV would remain the same.
    B)the end systolic volume (ESV) would be greater.
    C)the end diastolic volume (EDV) would be greater.
    D)less blood would flow into the ventricles.
    C)the end diastolic volume (EDV) would be greater.
    (this multiple choice question has been scrambled)
  11. The ____________ collects blood from all other veins draining the myocardium and returns this blood to the right atrium.
    A)great cardiac vein
    B)coronary sinus
    C)left circumflex artery
    D)posterior cardiac vein
    E)middle cardiac vein
    B)coronary sinus
    (this multiple choice question has been scrambled)
  12. Which of the following is associated with the atria?
    A)chordae tendineae
    B)pectinate muscles
    C)papillary muscles
    D)trabeculae carneae
    B)pectinate muscles
    (this multiple choice question has been scrambled)
  13. Myocardial ischemia may cause
    A)cardiac arrest.
    B)cardiac defibrillation.
    C)cardiac stenosis.
    D)angina pectoris.
    D)angina pectoris.
    (this multiple choice question has been scrambled)
  14. Of the pathways listed, which correctly describes a route that blood can take in a normal human?
    A)right atrium > pulmonary semilunar valve > right ventricle > tricuspid valve
    B)right atrium > tricuspid valve > right ventricle > aortic semilunar valve
    C)left atrium > bicuspid valve > left ventricle > aortic semilunar valve
    D)left atrium > tricuspid valve > left ventricle > pulmonary semilunar valve
    E)tricuspid valve > right atrium > pulmonary semilunar valve > right ventricle
    C)left atrium > bicuspid valve > left ventricle > aortic semilunar valve
    (this multiple choice question has been scrambled)
  15. This chamber has to work harder than the others, so it has the thickest myocardium.
    A)right ventricle
    B)left ventricle
    C)right atrium
    D)left atrium
    B)left ventricle
    (this multiple choice question has been scrambled)
  16. The vessel just before the circumflex artery in normal circulation is the
    A)left coronary artery.
    B)coronary sinus.
    C)anterior interventricular artery.
    D)great cardiac vein.
    C)anterior interventricular artery.
    (this multiple choice question has been scrambled)
  17. Which of the following structures allow one cardiac cell to electronically stimulate another by allowing ion flow across the intercalated disk?
    A)desmosomes
    B)intercellular folds
    C)fascia adherens
    D)gap junctions
    D)gap junctions
    (this multiple choice question has been scrambled)
  18. The most correct sequence in the cardiac conduction system is
    A)SA node > AV node > AV bundle > bundle branches > Purkinje fibers.
    B)Purkinje fibers > AV bundle > SA node > AV node > bundle branches.
    C)AV bundle > AV node > bundle branches > SA node > Purkinje fibers.
    D)SA node > AV bundle > AV node > bundle branches > Purkinje fibers.
    E)AV bundle > SA node > AV node > bundle branches > Purkinje fibers.
    A)SA node > AV node > AV bundle > bundle branches > Purkinje fibers.
    (this multiple choice question has been scrambled)
  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
    A)PQ segment.
    B)T wave.
    C)P wave.
    D)QRS complex.
    E)It does not appear on the EKG since it is obscured by the QRS complex.
    E)It does not appear on the EKG since it is obscured by the QRS complex.
    (this multiple choice question has been scrambled)
  21. Which of the following statements is incorrect?
    A)Firing signals reach the papillary muscles before the rest of the ventricular myocardium.
    B)The signal to contract is delayed at the AV node, allowing the ventricles to fill with blood.
    C)The firing of the SA node stimulates both atria to contract almost simultaneously.
    D)Ventricular contraction begins at the AV valves and progresses downward toward the apex of the heart.
    D)Ventricular contraction begins at the AV valves and progresses downward toward the apex of the heart.
    (this multiple choice question has been scrambled)
  22. A normal heartbeat of 70–80 beats per minute is referred to as
    A)nodal rhythm.
    B)fibrillation.
    C)heart block.
    D)sinus rhythm.
    E)systolic rhythm.
    D)sinus rhythm.
    (this multiple choice question has been scrambled)
  23. All of the following are cardiac stimulants except
    A)caffeine, nicotine, and chocolate.
    B)thyroid hormone.
    C)potassium and calcium ions.
    D)epinephrine.
    C)potassium and calcium ions.
    (this multiple choice question has been scrambled)
  24. Unlike skeletal muscles, cardiac muscle has this feature.
    A)long, slender, unbranched cells
    B)Calcium ions can come from ECF.
    C)larger cisternae
    D)several nuclei
    E)smaller T tubules
    B)Calcium ions can come from ECF.
    (this multiple choice question has been scrambled)
  25. Closure of the AV valves occurs when
    A)ventricular pressure exceeds atrial pressure.
    B)the second heart sound is heard.
    C)ventricular pressure and atrial pressure are equal.
    D)blood is ejected from the ventricles.
    E)atrial pressure exceeds ventricular pressure.
    A)ventricular pressure exceeds atrial pressure.
    (this multiple choice question has been scrambled)
  26. Which of the following is the correct sequence of events occurring in the cardiac cycle?
    A)atrial systole, ventricular systole, atrial diastole, and ventricular diastole
    B)atrial diastole, atrial systole, ventricular diastole, and ventricular systole
    C)atrial systole, atrial diastole, ventricular systole, and ventricular diastole
    D)atrial diastole, ventricular diastole, atrial systole, and ventricular systole
    C)atrial systole, atrial diastole, ventricular systole, and ventricular diastole
    (this multiple choice question has been scrambled)
  27. During a normal cardiac cycle which phase has the longest duration?
    A)valvular period
    B)ventricular systole
    C)quiescent period
    D)atrial systole
    C)quiescent period
    (this multiple choice question has been scrambled)
  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
    A)the end diastolic volume (EDV) would be greater.
    B)less blood would flow into the ventricles.
    C)the end systolic volume (ESV) would be greater.
    D)the EDV and ESV would remain the same.
    A)the end diastolic volume (EDV) would be greater.
    (this multiple choice question has been scrambled)
  30. An effectively three-chambered heart, as in septal defects, can lead to
    A)mixing of oxygenated and deoxygenated blood.
    B)surplus oxygen in the blood.
    C)vein blockage.
    D)sinus venosus.
    E)double circulation.
    A)mixing of oxygenated and deoxygenated blood.
    (this multiple choice question has been scrambled)
  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
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314988
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Ch 19 lec
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Ch 19 lec
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