Human Heart Function and Anatomy Quiz
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Questions and Answers

What is the term used when both S3 and S4 heart sounds are heard?

  • S5
  • S8
  • S6
  • S7 (correct)
  • How is a murmur graded?

  • On a scale from 1-6 (correct)
  • On a scale from 1-8
  • On a scale from 1-10
  • On a scale from 1-5
  • What is the formula for calculating cardiac output?

  • CO = SV x HR (correct)
  • CO = HR - SV
  • CO = HR / SV
  • CO = SV + HR
  • What does the ejection fraction represent?

    <p>The ratio of stroke volume to end diastolic volume</p> Signup and view all the answers

    What is the term for the difference between maximum cardiac output and resting cardiac output?

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

    How do sympathetic and parasympathetic nervous systems affect heart rate?

    <p>Sympathetic increases heart rate, while parasympathetic decreases heart rate</p> Signup and view all the answers

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

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

    Which chamber of the heart receives blood continuously from the pulmonary circuit?

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

    In what phase of the cardiac cycle do the atrioventricular valves open prior to atria contraction?

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

    Which element is responsible for causing the action potential (electrical current) in cardiac muscle?

    <p>Na, Ca, and K</p> Signup and view all the answers

    Where is the SA node located in the heart?

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

    What is the main function of conducting cells in the heart?

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

    Which structure is responsible for hiding atrial repolarization in an electrocardiogram (EKG)?

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

    During which phase of the cardiac cycle does atrial systole occur?

    <p>Atrial systole lasts about 100 ms</p> Signup and view all the answers

    What is the name for the amount of blood that left the heart during a contraction?

    <p>Stroke volume</p> Signup and view all the answers

    What causes the 'Lub' sound in a heart auscultation?

    <p>Closing of atrioventricular valves</p> Signup and view all the answers

    Where is the heart located in the body?

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

    Which chamber of the heart expels blood to the body?

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

    What is the function of the pulmonary circuit?

    <p>To allow blood to get oxygen in the lungs</p> Signup and view all the answers

    Which layer surrounds the heart and is also considered the outermost layer of the heart?

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

    In which part of the heart are three septa found?

    <p>Between the atria and ventricles</p> Signup and view all the answers

    Which vessels always carry blood back to the heart?

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

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