Srg Feb2017 Comprehensive Exam 3: Cardiac Anatomy, Physiology, Conditions, Assessment And Management

50 Questions | Total Attempts: 64

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Srg Feb2017 Comprehensive Exam 3: Cardiac Anatomy, Physiology, Conditions, Assessment And Management

Questions and Answers
  • 1. 
    Which of these descriptions of the heart's location is correct? 

    • A. 

      The heart lies obliquely in the mediastinum.

    • B. 

      Its base is directed anteriorly and slightly superiorly. 


    • C. 

      Its apex is directed posteriorly and slightly inferiorly. 


    • D. 

      Two-thirds of the heart's mass lies to the right of the midline of the sternum.

  • 2. 
    True of the pericardium except: 
    • A. 

      Both the fibrous and parietal serous pericardium are supplied by phrenic

    • B. 

      It is attached to the sternum, respiratory diaphragm and great vessels of the heart

    • C. 

      Its parietal and visceral serous layers form the pericardial cavity

    • D. 

      Both the parietal and visceral serous pericardium are supplied by the vagus nerve

  • 3. 
    The epicardium: 
    • A. 

      Is the pacemaker of the heart

    • B. 

      Is known as the parietal pericardium

    • C. 

      Is the visceral pericardium

    • D. 

      Lines the heart chambers

  • 4. 
    The heart valves have a double layer of __________ with a layer of __________ in between.
    • A. 

      Epicardium, myocardium

    • B. 

      Epicardium, endocardium

    • C. 

      Myocardium, endocardium


    • D. 

      Endocardium, connective tissue

  • 5. 
    Which of the following does not contribute to its diaphragmatic or inferior surface?
    • A. 

      Area on the 6th ICS

    • B. 

      L atrium

    • C. 

      Mitral pulse

    • D. 

      L ventricle

  • 6. 
    Which of these structures deliver(s) blood to the left atrium? 

    • A. 

      Coronary sinus


    • B. 

      Superior vena cava

    • C. 

      Inferior vena cava

    • D. 

      Pulmonary veins

  • 7. 
    What is the origin of the L coronary artery?
    • A. 

      R aortic sinus at the base of ascending aorta

    • B. 

      L aortic sinus at the base of ascending aorta

    • C. 

      R aortic sinus at the base of the arch of aorta

    • D. 

      L aortic sinus at the base of the arch of aorta

  • 8. 
    Strong connective tissue strings that are attached to papillary muscles and to the cusps of the atrioventricular valves are:
    • A. 

      Musculi pectinati

    • B. 

      Chordae tendinae

    • C. 

      Trabeculae carneae

    • D. 

      The skeleton of the heart

  • 9. 
    The low resistance pathways between myocardial cells that allow the spread of action potentials:
    • A. 

      Gap junctions

    • B. 

      Transverse tubules

    • C. 

      Sarcoplasmic reticulum

    • D. 

      Intercalated discs

  • 10. 
    The portion of the intrinsic conduction system located in the interventricular septum is the: 
    • A. 

      SA node

    • B. 

      Bundle of His and its branches

    • C. 

      Purkinje fibers

    • D. 

      AV node

  • 11. 
    Stimulation of this nerve will result to decreased heart rate.
    • A. 

      CN XII

    • B. 

      CN XI

    • C. 

      CN X

    • D. 

      NOTA

  • 12. 
    In a fetus, this structure temporarily shunts blood from the pulmonary trunk into the aorta. 
    • A. 

      Foramen ovale

    • B. 

      Fossa ovalis

    • C. 

      Annulus ovalis

    • D. 

      Ductus arteriosus

  • 13. 
    Where would you listen for the sound of the aortic valve?
    • A. 

      5th left ICS near sternal border

    • B. 

      Right lower end of the sternum

    • C. 

      2nd L ICS near sternal border

    • D. 

      2nd R ICS near medial end of the costal cartilage

  • 14. 
    After isovolumetric contraction, the proper sequence during a cardiac cycle:1. reduced ventricular filling2. atrial systole3. rapid ejection4. isovolumetric relaxation 
    • A. 

      1,2,3,4

    • B. 

      2,3,1,4

    • C. 

      3,1,2,4

    • D. 

      3,4,1,2

  • 15. 
    If the SA node becomes damaged and nonfunctional, which of these is the most likely to occur?
    • A. 

      The heart will stop. 


    • B. 

      The ventricles will contract, but the atria will stop.

    • C. 

      Another part of the heart, possibly the AV node, will become the 
pacemaker.

    • D. 

      The heart will beat faster. 


  • 16. 
    Which of these statements concerning cardiac muscle is correct?
    • A. 

      Cardiac muscle has more sarcoplasmic reticulum than skeletal muscle. 


    • B. 

      Cardiac muscle has a prolonged period of slow repolarization called the plateau phase. 


    • C. 

      Cardiac muscle has a shorter refractory period than skeletal muscle. 


    • D. 

      Depolarization of cardiac muscle occurs when K+ and Na+ diffuse 
into the cell.

  • 17. 
    Early repolarization of cardiac muscle cells occurs when:
    • A. 

      Voltage-gated Ca2+ ion channels open

    • B. 

      Voltage-gated K+ ion channels open

    • C. 

      Voltage-gated Na+ ion channels close

    • D. 

      Both B and C

  • 18. 
    Unlike other fast response type of cardiac muscle cells, the movement of __________ into the pacemaker cells is primarily responsible for the depolarization phase of the action potential. 
 
    • A. 

      Ca2+ ions

    • B. 

      K+ ions

    • C. 

      Na+ ions

    • D. 

      Cl- ions

  • 19. 
    In an ECG, the P wave represents:
    • A. 

      Depolarization of the atria

    • B. 

      Repolarization of the atria

    • C. 

      Depolarization of the ventricles

    • D. 

      Repolarization of the ventricles

  • 20. 
    Which of these conditions is most likely to cause bradycardia? 
 
    • A. 

      Ectopic action potentials in the atria

    • B. 

      Damage to the tricuspid valve

    • C. 

      Excessive sympathetic stimulation

    • D. 

      Excessive parasympathetic stimulation

  • 21. 
    During the period of ejection in the cardiac cycle, the atrioventricular valves are __________ and the semilunar valves are __________. 
 
    • A. 

      Closed, closed

    • B. 

      Closed, open

    • C. 

      Open, closed

    • D. 

      Open, open

  • 22. 
    A patient has a blood pressure of 90/60 mm Hg. Compute for the patient’s mean arterial pressure. 
    • A. 

      65 mmHg

    • B. 

      70 mm Hg

    • C. 

      75 mmHg

    • D. 

      80 mm Hg

  • 23. 
    During the period of ejection, the left ventricular pressure reaches a high point of approximately:
    • A. 

      120 mm Hg

    • B. 

      100 mm Hg

    • C. 

      80 mm Hg

    • D. 

      60 mm Hg

  • 24. 
    Increased venous return in the heart causes increased
    • A. 

      Stroke volume

    • B. 

      Preload

    • C. 

      Cardiac output

    • D. 

      Force of contraction

    • E. 

      AOTA

  • 25. 
    Which one do you like?
    • A. 

      Option 1

    • B. 

      Option 2

    • C. 

      Option 3

    • D. 

      Option 4

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