N105.1: Cardiovascular System I Learning Outcomes
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Questions and Answers

During which phase of the cardiac cycle do the atria contract first?

  • Systole phase (correct)
  • Diastole phase
  • Ventricular phase
  • Atrioventricular phase
  • Which valve separates the right atrium from the right ventricle?

  • Pulmonary valve
  • Aortic valve
  • Tricuspid valve (correct)
  • Mitral valve
  • What is the main function of the pulmonary valve in the heart circulation?

  • To direct oxygenated blood to the lungs
  • To prevent backflow of blood into the right atrium (correct)
  • To distribute oxygenated blood throughout the body
  • To regulate blood flow between the right atrium and right ventricle
  • What sound is associated with the 'lub-dub' sequence in heart sounds?

    <p>'Lub' is associated with ventricular contraction</p> Signup and view all the answers

    What event characterizes the diastole phase of the cardiac cycle?

    <p>The heart fills with blood as both atria and ventricles relax</p> Signup and view all the answers

    Where does deoxygenated blood enter in the cardiac circulation?

    <p>Right atrium through the tricuspid valve</p> Signup and view all the answers

    Which structure is responsible for distributing oxygenated blood throughout the body?

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

    What is the primary function of heart sounds 'lub' and 'dub'?

    <p>'Lub' marks the start of a new heartbeat cycle</p> Signup and view all the answers

    Which phase of the cardiac cycle involves a pause before the next heartbeat sequence begins?

    <p>'Dub-lub' phase</p> Signup and view all the answers

    What initiates each cardiac cycle by contracting first before other heart chambers?

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

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