Per312 Yelda: Layers of the Heart Pericardium
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Questions and Answers

What is the function of the aortic and pulmonary valves?

  • To prevent backflow of blood from the ventricles into the atria during systole
  • To allow backflow of blood from the ventricles into the atria during systole
  • To allow backflow of blood from the aorta and pulmonary trunk into the ventricles during diastole
  • To prevent backflow of blood from the aorta and pulmonary trunk into the ventricles during diastole (correct)
  • Where is the SA node located?

  • In the posterior wall of the right atrium near the entrance of the superior vena cava (correct)
  • In the interventricular septum
  • In the Bundle of His
  • In the floor of the right atrium near the opening of the coronary sinus
  • What is the role of the AV node in the cardiac conduction system?

  • It receives the impulse from the SA node and transmits it to the Bundle of His. (correct)
  • It spreads the impulse throughout both atria.
  • It generates the fastest rate of impulse generation.
  • It divides the impulse into the right and left bundle branches.
  • Which nervous system has the dominant effect on myocardial contractility?

    <p>The sympathetic nervous system has the dominant effect.</p> Signup and view all the answers

    What are the two main branches of the right coronary artery (RCA)?

    <p>The Right posterior descending artery and the Right acute marginal artery</p> Signup and view all the answers

    What is the name of the single vessel exiting the right ventricle?

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

    What is the function of the pericardial fluid between the two layers of the pericardium?

    <p>To minimize friction during cardiac contraction</p> Signup and view all the answers

    How many chambers make up each half of the heart?

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

    What is the function of the semilunar valves?

    <p>To allow blood to flow from the ventricles into the arteries</p> Signup and view all the answers

    What is the purpose of the chordae tendineae in the right ventricle?

    <p>To anchor the tricuspid valve</p> Signup and view all the answers

    What is the difference between the inflow and outflow regions of the right ventricle?

    <p>The inflow region receives blood from the right atrium, while the outflow region ejects blood into the pulmonary arteries</p> Signup and view all the answers

    What is the function of the papillary muscles in the right ventricle?

    <p>To anchor the chordae tendineae and prevent prolapse of the tricuspid valve</p> Signup and view all the answers

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