Anatomy And Physiology: The Heart Pt. 2

37 Questions | Total Attempts: 48

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Anatomy And Physiology Quizzes & Trivia

The Cardiac Cycle, Cardiac Output, Cardiac Disease, Exercise


Questions and Answers
  • 1. 
    How does the heart change pressure in order to produce flow?
    • A. 

      By repolarizing to increase pressure in a chamber

    • B. 

      By relaxing to decrease pressure in a chamber

    • C. 

      By contracting to increase pressure in a chamber

    • D. 

      By depolarizing to decrease pressure in a chamber

  • 2. 
    How are flow and pressure related?
    • A. 

      Flow will increase if the difference in pressure between two points decreases

    • B. 

      Flow will increase if the difference in pressure between two points increases

    • C. 

      Flow will go backwards if there is no difference in pressure between two points

    • D. 

      If flow between two points increases, then the difference in pressure will increase

  • 3. 
    Clogged arteries may cause reduced flow of blood from the heart. Why wold there be less flow?
    • A. 

      Because it increases afterload

    • B. 

      Because it decreases resistance

    • C. 

      Because it decreases preload

    • D. 

      Because it increases contractility

  • 4. 
    Which of the following will cause the aortic semilunar valve to close?
    • A. 

      When pressure in the left ventricule is higher than pressure in the left atrium

    • B. 

      When pressure in the aorta is higher than pressure in the left ventricle

    • C. 

      When pressure in the left ventricle is higher than pressure in the aorta

    • D. 

      When pressure in the left atrium is higher than pressure in the aorta

  • 5. 
    Which of the following is associated with the second heart sound?
    • A. 

      Depolarization of the atria

    • B. 

      Closing of the atriventricular valves

    • C. 

      The rush of blood from the atria to the ventricles

    • D. 

      Pressure in the ventricles become lower than pressure in the great arteries

  • 6. 
    Which of the following will happen first as the ventricles begin to contract?
    • A. 

      Semilunar valves will close

    • B. 

      Atriventricular valves will open

    • C. 

      Semilunar valves will open

    • D. 

      Atrioventricular valves will close

  • 7. 
    What do isovolumetric contraction and isovolumetric relaxation have in common?
    • A. 

      The semilunar valves are closed

    • B. 

      The volume of blood in the ventricles remains the same

    • C. 

      The atrioventricular valves are closed

    • D. 

      All of the above

  • 8. 
    The semilunar valves are open, and the ventricles are contracting. What phase of the cardiac cycle is this?
    • A. 

      Isovolumetric relaxation

    • B. 

      Rapid ventricular filling

    • C. 

      Ventricular ejection (systole)

    • D. 

      Isovolumetric contraction

  • 9. 
    Which of the following is occuring at the same time that depolarization is spreading through the AV Node?
    • A. 

      Ventricles are contracting

    • B. 

      Atria are contracting

    • C. 

      Ventricles are relaxing

    • D. 

      Atria are relaxing

  • 10. 
    At which of the following points do the ventricles have the smallest volume of blood?
    • A. 

      At the end of isovolumetric relaxtion

    • B. 

      At the end of rapid ventricular filling

    • C. 

      At the beginning of ventricular ejection

    • D. 

      At the end of isovolumetric contraction

  • 11. 
    Which of the following statements about the cardiac output (CO) are true?
    • A. 

      CO is a measure of how much blood the heart pumps in one minute

    • B. 

      SV x HR = CO

    • C. 

      CO increases in exercise due to increases in both SV and HR

    • D. 

      All of the above

  • 12. 
    If the right ventricle had lower output than the left, which of the following would result?
    • A. 

      Systemic edema

    • B. 

      Increased afterload for right ventricle

    • C. 

      Right ventricular hypertrophy

    • D. 

      All of the above

  • 13. 
    Cor pulmonale is a type of _______ that originates from obstruction in the pulmonary circulation.
    • A. 

      Angina pectoris

    • B. 

      Congestive heart failure

    • C. 

      Myocardial infarction

    • D. 

      Atherosclerosis

  • 14. 
    Which of the following would definitely cause a decrease in cardiac output?
    • A. 

      An increase in heart rate with no change in stroke volume

    • B. 

      A decrease in stroke volume with no change in heart rate

    • C. 

      An increase in stroke volume with a decrease in heart rate

    • D. 

      An increase in stroke volume with no change in heart rate

  • 15. 
    If venous return decreased, which of the follwing would likely happen as a result?
    • A. 

      Afterload would increase

    • B. 

      The ventricles would contract more forcefully

    • C. 

      The ventricles would contract less forcefully

    • D. 

      Preload would increase

  • 16. 
    Which of the following is an example of postive feedback in the circulatory system?
    • A. 

      When blood pressure drops, the heart is stimulated to increase cardiac output and restore pressure.

    • B. 

      If more blood enters the ventricles, then the ventricles will pump out more blood.

    • C. 

      After depolarizing, cardiac myocytes repolarize (or return to the resting membrane potential)

    • D. 

      Unbalanced ventricular output leads to failure of one side of the heart, followed by failure of the other side of the heart.

  • 17. 
    If blood pressure in the aorta or caotid arteries suddenly increased, how would the baroreflex restore blood pressure?
    • A. 

      It would increase heart rate

    • B. 

      It would decrease heart rate

    • C. 

      It would increase stroke volume

    • D. 

      It would decrease stroke volume

  • 18. 
    Which of the following statements is true regarding central regulation of heart rate (HR)?
    • A. 

      The cardioinhibitory center increases HR through parasympathetic neurons that release ACh and hyperpolarize the SA node.

    • B. 

      The cardioacceleratory center decreases HR through sympathetic neurons that release norepinephrine and bind to B-receptors

    • C. 

      Patients with weak hearts are comtimes given drugs called B-Blockers which prevents sympathetic stimulation of HR.

    • D. 

      All of the above are true

  • 19. 
    Which of the following influence stroke volume?
    • A. 

      End of systolic volume

    • B. 

      Cardiac output

    • C. 

      Contractility

    • D. 

      Heart rate

  • 20. 
    Which of the following decreases stroke volume?
    • A. 

      Increased afterload

    • B. 

      Increased heart rate

    • C. 

      Decreased preload

    • D. 

      Increased contractility

  • 21. 
    You have a patient whose heart cannot generate sufficient force during contraction. You have a range of drugs to choose from, but in general, you know that you want a drug that:
    • A. 

      Increases intracellular Ca2+

    • B. 

      Increases intracellular K+

    • C. 

      Decreases extracellular Na+

    • D. 

      Is negative chronotropic

  • 22. 
    Hypertension is an example of:
    • A. 

      Increased contractility

    • B. 

      Increased preload

    • C. 

      Increased afterload

    • D. 

      Decreased afterload

  • 23. 
    The volume of blood ejected by the ventricle during one cardiac cycle is called:
    • A. 

      End of systolic volume

    • B. 

      Cardiac output

    • C. 

      End of diastolic volume

    • D. 

      Stroke volume

  • 24. 
    Which of the following decreases afterload?
    • A. 

      Increased venous return

    • B. 

      Hypotension

    • C. 

      Hyperkalemia

    • D. 

      All of the above

  • 25. 
    Which of the following is a long-term adjustment to exercise that you might expect to see in an athlete?
    • A. 

      Lower stroke volume

    • B. 

      Ventricular hypertrophy

    • C. 

      Higher resting heart rate

    • D. 

      All of the above

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