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Chapter 17: Function Of The Heart

45 Questions
Heart Quizzes & Trivia

Anatomy 2, Chapter 17

Questions and Answers
  • 1. 
    Systole and diastole describe the function of the
    • A. 

      Pericardium

    • B. 

      SA node

    • C. 

      Myocardium

    • D. 

      Mediastinum

  • 2. 
    During atrial systole, the
    • A. 

      AV valves are closed

    • B. 

      Ventricles are relaxed

    • C. 

      Ventricles are in systole

    • D. 

      Semilunar valves are open

  • 3. 
    What happens during ventricular diastole?
    • A. 

      The ventricles are filling with blood

    • B. 

      All semilunar valves are open

    • C. 

      Both AV valves are closed

    • D. 

      Blood is pumped to the lungs and systemic circulation

  • 4. 
    Which of the following is the most likely consequence of a very rapid heart rate?
    • A. 

      Decreased ventricular filling (with blood)

    • B. 

      Failure of the AV valves to open

    • C. 

      Failure of the SA node to fire

    • D. 

      Failure of the cardiac impulse to enter the His-Purkinje system

  • 5. 
    Which of the following does not happen to a ventricle?
    • A. 

      Activation of the beta1 adrenergic receptors

    • B. 

      Discharge of sympathetic nerves

    • C. 

      Discharge of the vagal nerve

    • D. 

      Binding of norepinephrine to its receptor

  • 6. 
    • A. 

      Vagolytic drug

    • B. 

      Beta1 adrenergic agonist

    • C. 

      Sympathomimetic

    • D. 

      Beta1 adrenergic blocker

  • 7. 
    Which of the following is responsible for the Starling effect?
    • A. 

      Sympathetic nerve firing

    • B. 

      Vagal discharge

    • C. 

      Activation of the beta1 adrenergic receptors

    • D. 

      End diastolic volume (EDV)

  • 8. 
    Which of the following is most likely to increase stroke volume?
    • A. 

      A (+) inotrpic drug

    • B. 

      A vagolytic drug

    • C. 

      A (-) chronotropic drug

    • D. 

      A beta1 adrenergic blocker

  • 9. 
    Which of the following is most likely to increase ejection fraction?
    • A. 

      Activation of beta1 adrenergic receptors

    • B. 

      Vagal discharge

    • C. 

      Blockade of beta1 adrenergic receptors

    • D. 

      Blockade of the muscarinic receptors

  • 10. 
    Which of the following is the same as end dialostic volume?
    • A. 

      Stroke volume

    • B. 

      Cardiac output

    • C. 

      Preload

    • D. 

      Cardiac reserve

  • 11. 
    What terms refers to the amount of blood pumped by the ventricle in one boat?
    • A. 

      Cardiac output

    • B. 

      Blood volume

    • C. 

      Hematocrit

    • D. 

      Stroke volume

  • 12. 
    Which term refers to the amount of blood pumped by the heart in one minute?
    • A. 

      Stroke volume

    • B. 

      Cardiac output

    • C. 

      Starling's law of the heart

    • D. 

      Inotropic effect

  • 13. 
    Sympathetic nerve stimulation of the myocardium
    • A. 

      Causes a (+) inotropic effect

    • B. 

      Decreases cardiac output

    • C. 

      Decreases heart rate

    • D. 

      Decreases stroke volume

  • 14. 
    Vagal stimulation to the heart causes
    • A. 

      A (+) inotrpoic effect

    • B. 

      Heart rate to slow

    • C. 

      Cardiac output to increase

    • D. 

      Stroke volume to increase

  • 15. 
    Excess vagal stimulation to the SA node is most likely to cause
    • A. 

      Hypertension

    • B. 

      Bradycardia

    • C. 

      Tachycardia

    • D. 

      Anemia

  • 16. 
    Which of the following is descriptive of the vagus nerve?
    • A. 

      "fight or flight"

    • B. 

      Parasympathetic

    • C. 

      Sympathetic

    • D. 

      Adrenergic

  • 17. 
    Heart rate and stroke volume determine
    • A. 

      Hemotocrit

    • B. 

      Total blood volume

    • C. 

      Cardiac output

    • D. 

      The size of the heart valves

  • 18. 
    A drug (i.e., atropine) that blocks the vagus nerve
    • A. 

      Stops the heart

    • B. 

      Increases the heart rate

    • C. 

      Decreases cardiac output

    • D. 

      Decreases stroke volume

  • 19. 
    Activation of the muscarinic receptors by acetylcholine
    • A. 

      Increases myocardial contractile force

    • B. 

      Causes a (+) chronotropic effect

    • C. 

      Increases cardiac output

    • D. 

      Slows heart rate

  • 20. 
    Decreased blood flow through the coronary arteries is most likely to cause
    • A. 

      Valve damage

    • B. 

      Pulmonary edema

    • C. 

      Angina pectoris

    • D. 

      Bradycardia

  • 21. 
    This term refers to a heart rate of fewer that 60 beats/min
    • A. 

      Bradycardia

    • B. 

      Heart block

    • C. 

      Fight-or-flight response

    • D. 

      Tachycardia

  • 22. 
    Vagal stimulation on the heart
    • A. 

      Increases the force of myocardial contraction

    • B. 

      Increases the amount of blood that flows into the heart from the vena cava

    • C. 

      Causes tachycardia

    • D. 

      Slows the heart rate

  • 23. 
    Which of the following most accurately describes the vagus nerve?
    • A. 

      "fight or flight"

    • B. 

      Norepinephrine

    • C. 

      Parasympathetic

    • D. 

      Causes tachycardia

  • 24. 
    What is the term for the sequence of events that occur during one heartbeat?
    • A. 

      Stroke volume

    • B. 

      Cardiac output

    • C. 

      Cardiac cycle

    • D. 

      Systole

  • 25. 
    Which of the following contains 70ml?
    • A. 

      The cardiac output

    • B. 

      The volume of a ventricle

    • C. 

      An average stroke volume

    • D. 

      The amount of blood that flows through the pulmonary capillaries in one minute

  • 26. 
    Which of the following refers to a positive inotropic effect?
    • A. 

      Heart block

    • B. 

      A slow heart rate

    • C. 

      A rapid heartbeat

    • D. 

      An increased myocardial contractile force

  • 27. 
    Sympathetic stimulation to the heart
    • A. 

      Decreases stroke volume

    • B. 

      Increases heart rate

    • C. 

      Causes bradycardia

    • D. 

      Decreases cardiac output

  • 28. 
    Cardiac output is determined by heart rate and
    • A. 

      Systemic vascular resistance

    • B. 

      Stroke volume

    • C. 

      Hematocrit

    • D. 

      Hemoglobin concentration

  • 29. 
    What is the term that refers to an increase in stroke volume in response to the stretching of the heart?
    • A. 

      Starling's law of the heart

    • B. 

      A positive inotropic effect

    • C. 

      Heart block

    • D. 

      Angina pectoris

  • 30. 
    Atropine is a muscarinic antagonist and is therefore used to
    • A. 

      Relieve bradycardia

    • B. 

      Decreased heart rate

    • C. 

      Block the effects of norepinephrine

    • D. 

      Increase myocardial contractile force

  • 31. 
    Which of the following is descriptive of a drug that causes a (+) inotropic effect, a (+) dromotropic effect, and a (+) chronotropic effect?
    • A. 

      Vagomimetic

    • B. 

      Sympathomimetic

    • C. 

      Antimuscarinic

    • D. 

      Parasympatholytic

  • 32. 
    Which of the following drugs is sympathomimetic?
    • A. 

      Beta1 adrenergic blocker

    • B. 

      Muscarinic agonist

    • C. 

      Vagolytic

    • D. 

      Beta1 adrenergic agonist

  • 33. 
    An increased afterload (e.g., hypertension)
    • A. 

      Is usually caused by arteriolar dilation

    • B. 

      Increases the work of the heart

    • C. 

      Can only occur when preload increases

    • D. 

      Is usually caused by intense parasympathetic (vagal) discharge

  • 34. 
    An increased preload
    • A. 

      Decreases cardiac output

    • B. 

      Increases stroke volume

    • C. 

      Increases cardiac reserve

    • D. 

      Increases afterload

  • 35. 
    Cardiac output
    • A. 

      Is determined by heart rate and pulse

    • B. 

      Decreases in response to sympathetic nerve stimulation

    • C. 

      Increases in response to vagal discharge

    • D. 

      Is determined by heart rate and stroke volume

  • 36. 
    Increased return of the blood to the heart stretches the muscle, thereby
    • A. 

      Stimulating the sympathetic nerve

    • B. 

      Activating the beta1 adenergic receptors

    • C. 

      Closing the AV valves

    • D. 

      Increasing stroke volume

  • 37. 
    An ejection fraction of 30% is
    • A. 

      Normal

    • B. 

      Characteristic of a healthy person who is engaged in aerobic exercise

    • C. 

      Characteristic of a failing heart

    • D. 

      The amount of oxygenated hemoglobin in the blood on the left ventricle

  • 38. 
    A stenotic aortic valve
    • A. 

      Causes right ventricular hypertrophy and right-sided heart failure

    • B. 

      Increases afterload, thereby increasing the work of the left ventricle

    • C. 

      Causes a right-to-left shunt

    • D. 

      Is a narrowing of the semilunar valve

  • 39. 
    Which of the following is the most likely consequence of acute left ventricular failure?
    • A. 

      Jugular vein distention

    • B. 

      Hepatomegaly and splenomegaly

    • C. 

      Pulmonary edema

    • D. 

      Pedal edema

  • 40. 
    Most of the symptoms of acute left-sided heart failure are
    • A. 

      Relieved by morphine

    • B. 

      Cured by an antibiotic

    • C. 

      Respiratory in nature (e.g., dyspnea, orthopnea)

    • D. 

      Confined to the lower extremities

  • 41. 
     Which of the following is an example of forward failure?
    • A. 

      Blood accumulates in the pulmonary capillaries, elevating pressure and causing pulmonary edema

    • B. 

      Diminished renal blood flow stimulates the kidney to decrease urinary output and to retain Na+ and water

    • C. 

      Blood distends the jugular vein

    • D. 

      Blood distends the liver, causing hepatomegaly and digestive symptoms

  • 42. 
    Furosemide (Lasix), a potent diuretic, is administered in acute ventricular failure in order to
    • A. 

      Strengthen myocardial contractile force

    • B. 

      Increase plasma k+

    • C. 

      Excrete excess water and relieve the edema

    • D. 

      Relieve pain

  • 43. 
    Digoxin, a drug used in the treatment of heart failure, increases contractile force and is therefore called a
    • A. 

      Diuretic

    • B. 

      (+) dromotropic agent

    • C. 

      (+) inotropic agent

    • D. 

      (+) chronotropic agent

  • 44. 
    An increase in venous return causes an increase in cardiac output. This is accomplished by
    • A. 

      A (+) inotropic effect

    • B. 

      Depolarization

    • C. 

      Starling's law of the heart

    • D. 

      A (+) chronotropic effect

  • 45. 
    Milliliters/beat x beats/minute defines
    • A. 

      Stroke volume

    • B. 

      Ejection fraction

    • C. 

      Cardiac reserve

    • D. 

      Cardiac output

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