Human Heart and Cardiovascular System
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Human Heart and Cardiovascular System

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Questions and Answers

Which chamber of the heart receives blood from the body?

  • Left atrium
  • Right ventricle
  • Left ventricle
  • Right atrium (correct)

    • Where is the pericardium located in relation to the heart?

  • Superior to the apex of the heart
  • Inside the heart chambers
  • Between the lungs
  • Surrounds the heart (correct)

    • Which statement about the pulmonary circuit is correct?

  • Lets blood get oxygen (correct)
  • Sends blood with oxygen to the body
  • Is part of the systemic circuit
  • Carries deoxygenated blood back to the heart

    • Which layer of the heart is also the outermost layer of the heart?

    <p>Epicardium</p> Signup and view all the answers

    What separates the right atrium from the right ventricle?

    <p>Interatrial septum</p> Signup and view all the answers

    Which vessel carries deoxygenated blood away from the heart?

    <p>Pulmonary artery</p> Signup and view all the answers

    Which cardiac sound is indicative of failure of the left ventricle?

    <p>S4</p> Signup and view all the answers

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

    <p>70 ml</p> Signup and view all the answers

    Which nerve releases acetylcholine to decrease heart rate?

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

    What does the limbic system influence in relation to heart rate?

    <p>Emotion</p> Signup and view all the answers

    In cardiac physiology, what is the formula for cardiac output?

    <p>$CO = SV \times HR$</p> Signup and view all the answers

    At peak performance, elite athletes might have how many times their normal cardiac output?

    <p>7-8 times</p> Signup and view all the answers

    What is the function of the semilunar valves in the heart?

    <p>Prevent backflow from arteries back into ventricles</p> Signup and view all the answers

    Where are the papillary muscles located in the heart?

    <p>In the ventricles contracting to prevent backflow</p> Signup and view all the answers

    Which chamber of the heart is responsible for ejecting blood into the systemic circuit?

    <p>Left ventricle</p> Signup and view all the answers

    What is the role of the SA node in the heart's electrical conduction system?

    <p>Establishes cardiac rhythm</p> Signup and view all the answers

    Which element is NOT involved in causing the action potential (electrical current) in cardiac muscle cells?

    <p>Mg</p> Signup and view all the answers

    What causes the P wave in an electrocardiogram (EKG)?

    <p>Depolarization of the atria</p> Signup and view all the answers

    When do you hear the 'Dub' sound during auscultation of the heart?

    <p>At the start of diastole</p> Signup and view all the answers

    What is the purpose of using an electrocardiogram (EKG) for diagnosing cardiac problems?

    <p>To monitor electrical activity of the heart</p> Signup and view all the answers

    What event occurs during ventricular ejection stage of the cardiac cycle?

    <p>Blood is pushed into the aorta and pulmonary arteries</p> Signup and view all the answers

    What is stroke volume referring to in relation to cardiac function?

    <p>Amount of blood that left the heart per beat</p> Signup and view all the answers

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