Human Heart Anatomy and Function Quiz
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Questions and Answers

What is the formula for calculating cardiac output (CO)?

  • CO = SV / HR
  • CO = SV - HR
  • CO = SV * HR (correct)
  • CO = SV + HR

    • Why does breathing deeply amplify heart murmurs?

  • It increases the amount of oxygen in the blood
  • It increases blood circulation through the body
  • It allows the heart to fill more before contraction (correct)
  • It decreases heart rate

    • What is the normal stroke volume for a 150 lbs. individual?

  • 70 ml (correct)
  • 60 ml
  • 90 ml
  • 40 ml

    • Which nerve decreases heart rate through the release of acetylcholine?

    <p>Vagus nerve</p> Signup and view all the answers

    What is the difference between max cardiac output (CO) and resting CO known as?

    <p>Cardiac reserve</p> Signup and view all the answers

    How does sympathetic stimulation affect heart rate?

    <p>Increases heart rate</p> Signup and view all the answers

    Where is the heart located in the body?

    <p>Between the lungs in the mediastinum</p> Signup and view all the answers

    What is the function of the pericardium?

    <p>It surrounds the heart and separates it from other structures</p> Signup and view all the answers

    Which statement about arteries is correct?

    <p>Arteries carry blood towards the heart</p> Signup and view all the answers

    What is the purpose of the pulmonary circuit?

    <p>To let the blood get oxygen</p> Signup and view all the answers

    Which statement accurately describes cardiac hypertrophy?

    <p>It is often seen in aerobic athletes</p> Signup and view all the answers

    What is the role of septa in the heart?

    <p>To separate the chambers of the heart</p> Signup and view all the answers

    Which valves in the heart prevent backflow from arteries back into ventricles?

    <p>Semilunar valves</p> Signup and view all the answers

    Where is the SA node located?

    <p>In the superior and posterior aspect of right atrium</p> Signup and view all the answers

    What is the function of the AV node?

    <p>Slows down the signal to allow atria to finish contracting before ventricles contract</p> Signup and view all the answers

    Which part of an electrocardiogram represents the depolarization of the ventricles?

    <p>QRS complex</p> Signup and view all the answers

    What is the average end diastolic volume in the heart?

    <p>~130 ml</p> Signup and view all the answers

    During which phase do semilunar valves close and atrioventricular valves remain closed?

    <p>Isovolumic ventricular relaxation phase</p> Signup and view all the answers

    What are the 'Heart Strings' pulled by the papillary muscles called?

    <p>Chordae tendineae</p> Signup and view all the answers

    What is the function of conducting cells in the heart?

    <p>Conduct action potential through the heart in the proper order</p> Signup and view all the answers

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