Chapter 18 heart

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Author:
hughes7
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282970
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Chapter 18 heart
Updated:
2014-09-13 23:42:24
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  1. The inner lining of the heart
    Endocardium
  2. Heart muscle is called
    myocardium
  3. Serous layer covering the heart muscle
    Epicardium
  4. The outermost layer of the serous pericardium
    Parital layer
  5. The pacemaker of the heart
    Sinoatrial node
  6. found in the interventricular septum
    AV bundle
  7. Network found in the ventricular myocardium
    Perkinjie fibers
  8. The point in the conduction system of the heart where the impulse is temporarily delayed
    AV node
  9. Prevents backflow into the left ventricle.
    Aortic valve
  10. Prevents backflow into the right atrium
    Tricuspid valve
  11. Prevents backflow into the left atrium.
    Mitral valve
  12. Prevents backflow into the right ventricle.
    D)  Pulmonary valves
  13. AV valve with two flaps
    Mitral valve
  14. AV valve with three flaps
    tricuspid valve.
  15. Heart muscle is deprived of oxygen
    A)  Ischemia
  16. Death of heart muscle cells.
    infarction
  17. A condition of rapid and irregular or out‐of‐phase contraction of heart muscle cells.
    Fibrillation
  18. An abnormal pacemaker
    Ectopic focus
  19. Total heart relaxation
    Quiescent period
  20. The myocardium receives its blood supply from the coronary arteries TORF
    True
  21. Cardiac muscle has more mitochondria and depends less on a continual supply of oxygen than does skeletal muscle TORF
    False
  22. Anastomoses among coronary arterial branches provide collateral routes for blood delivery to the heart muscle. TORF
    True
  23. Congestive heart failure means that the pumping efficiency of the heart is depressed so that there is inadequate delivery of blood to body tissues. TORF
    True
  24. Tissues damaged by myocardial infarction are replaced by connective tissue TORF
    True
  25. The left side of the heart pumps the same volume of blood as the right. TORF
    True
  26. Chronic release of excess thyroxine can cause a sustained increase in heart rate and a weakened heart. TORF
    True
  27. Arterial blood supply to heart muscle is continuous whether the heart is in systole or diastole TORF
    False
  28. Trabeculae carneae are found in the ventricles and never the atria.
    True
  29. The "lub" sounds of the heart are valuable in diagnosis because they provide information about the function of the heart's pulmonary and aortic valves TORF
    False
  30. Autonomic regulation of heart rate is via two reflex centers found in the pons. TORF
    False
  31. The papillary muscles contract after the other ventricular muscles so that they can take up the slack on the chordae tendineae before the full force of ventricular contractions sends blood against the AV valve flap. TORF
    False
  32. An ECG provides direct information about valve function.TORF
    Fasle
  33. As pressure in the aorta rises due to atherosclerosis, more ventricular pressure is required to open the aortic valve TORF
    true
  34. Proxysmal atrial tachycardia is characterized by bursts of atrial contractions with little pause between them. TORF
    True

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