Chapter 16

20 Questions

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Heart Quizzes & Trivia

Heart


Questions and Answers
  • 1. 
    Which of the following is least true of the myocardium?
    • A. 

      Contains actin and myosin

    • B. 

      Is the heart muscle

    • C. 

      Is found in the ventricles but not he atria

    • D. 

      Pumps the blood

  • 2. 
    During ventricular contraction, the AV valves close in order to 
    • A. 

      Speed up the action potential as it moves through the conduction system

    • B. 

      Prevent the backflow of blood from the ventricles to the atria

    • C. 

      Enhance drainage of the coronary veins

    • D. 

      Push blood into the venae cavae

  • 3. 
    Which of the following is least related to "lubb" (of the lubb-dupp duo)?
    • A. 

      Called S1

    • B. 

      Due to the closure of the AV valves

    • C. 

      Occurs at the beginning of ventricular contraction

    • D. 

      Caused by the firing of the SA node

  • 4. 
    S2 is
    • A. 

      Due to the closure of the semilunar valves at the beginning of ventricular relaxation

    • B. 

      Lubb

    • C. 

      The heart sound caused the contraction of the ventricular myocardium

    • D. 

      Caused by the firing of the SA node

  • 5. 
    The purpose of the right heart is to pump blood
    • A. 

      To the systemic circulation

    • B. 

      Into the aorta

    • C. 

      To the lungs for oxygenation

    • D. 

      To the venae cavae

  • 6. 
    What do the venae cavae, pulmonary artery, and the aorta have in common?
    • A. 

      All carry oxygenated blood

    • B. 

      All carry unoxygenated blood

    • C. 

      All are colored red

    • D. 

      All are called great vessels

  • 7. 
    In which structure does blood change from blue to red?
    • A. 

      Venae cavae

    • B. 

      Pulmonary artery

    • C. 

      Aorta

    • D. 

      Pulmonary capillary

  • 8. 
    Which of the following spaces does not contain the heart?
    • A. 

      Thoracic cavity

    • B. 

      Ventral cavity

    • C. 

      Pleural cavity

    • D. 

      Mediastinum

  • 9. 
    The semilunar valves
    • A. 

      Are outflow valves

    • B. 

      Are anchored by chordae tendineae

    • C. 

      "see" only oxygenated blood

    • D. 

      "see" only unoxygenated blood

  • 10. 
    A cell that spontaneously depolarizes from resting membrane potential to threshold potential is 
    • A. 

      Called a pacemaker cell

    • B. 

      Referred to as being ectopic

    • C. 

      A stem cell

    • D. 

      Found only in heart valves

  • 11. 
    The heart
    • A. 

      Lies primarily to the right of the sternum

    • B. 

      Only beats in response to stimulation by autonomic nerves

    • C. 

      Is located within the mediastinum

    • D. 

      Lies vertically and parallel to the midsternal line

  • 12. 
    Stenosis of this valve causes left ventricular hypertrophy
    • A. 

      Mitral

    • B. 

      Tricuspid

    • C. 

      Pulmonic

    • D. 

      Aortic

  • 13. 
    Which of the following is true of coronary blood flow?
    • A. 

      In a healthy heart, coronary blood flow can increase

    • B. 

      Atherosclerotic coronary blood vessels are usually maximally dilated at rest

    • C. 

      A decrease in coronary blood flow causes pain (called angina)

    • D. 

      All of the above are true

  • 14. 
    Which of the following is not true about the left ventricle?
    • A. 

      Pumps blood into the aorta

    • B. 

      Receives blood from the left atrium

    • C. 

      Contains oxygenated blood

    • D. 

      The oxygen from blood within the left ventricle diffuses across the endocardium into the left ventricular myocardium

  • 15. 
    A collection of excess fluid in the pericardial space
    • A. 

      Is called pericardial effusion

    • B. 

      Compresses the heart externally

    • C. 

      Impairs myocardial contraction

    • D. 

      All of the above are true

  • 16. 
    What is located at the second rib and fifth intercostal space?
    • A. 

      Base and apex of the heart

    • B. 

      Semilunar valves

    • C. 

      AV valves

    • D. 

      SA node and AV nodes

  • 17. 
    An enlarged myocardium (ventricular hypertrophy) indicates 
    • A. 

      That the heart must work harder than normal

    • B. 

      That there is inadequate coronary blood flow

    • C. 

      A stenotic mitral valve

    • D. 

      Chronic anemia

  • 18. 
    Both the pulmonic and aortic valves
    • A. 

      Are attached to chordae tendineae

    • B. 

      Are semilunar valves

    • C. 

      "see" oxygenated blood

    • D. 

      "see" unoxygenated blood

  • 19. 
    The action potential (cardia impulse) has two phases: 
    • A. 

      Systole and diastole

    • B. 

      Filling and ejecting

    • C. 

      Depolarization and repolarization

    • D. 

      P wave and T wave

  • 20. 
    The semilunar valves open in response to 
    • A. 

      Rising ventricular pressure during ventricular contraction

    • B. 

      Rising atrial pressure

    • C. 

      Rising pressure in the pulmonary artery and aorta

    • D. 

      Increasing oxygen saturation of the hemoglobin