Human Heart Anatomy and Function Quiz
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Questions and Answers

What does a murmur indicate?

  • High ejection fraction
  • Cardiac hypertrophy (correct)
  • Low cardiac output
  • Normal heart function
  • Which neurotransmitter is responsible for decreasing heart rate?

  • Cortisol
  • Acetylcholine (correct)
  • Norepinephrine
  • Epinephrine
  • What factor contributes to an increase in stroke volume?

  • Increased calcium ions (correct)
  • Decreased diastolic volume
  • Low contractility
  • High end systolic volume
  • What is the normal range for pH that affects heart rate?

    <p>7.35 - 7.45</p> Signup and view all the answers

    Which of the following factors will lead to an increase in heart rate?

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

    What is the target heart rate range for receiving maximum benefit from aerobic exercise?

    <p>130 - 150 BPM</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

    Which statement about the pulmonary circuit is true?

    <p>It lets blood get oxygen</p> Signup and view all the answers

    What separates the heart from other structures?

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

    How many chambers does the heart have?

    <p>4 chambers, 2 atria and 2 ventricles</p> Signup and view all the answers

    What is the function of arteries in relation to the heart?

    <p>Carry oxygenated blood away from the heart</p> Signup and view all the answers

    Which statement accurately describes cardiac hypertrophy?

    <p>Aerobic athletes will see more of this</p> Signup and view all the answers

    What prevents backflow from occurring in the heart?

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

    Which structure prevents the electrical impulse from going straight to the ventricles?

    <p>AV node</p> Signup and view all the answers

    What cells make up 99% of the myocardium and are responsible for contraction?

    <p>Myocardial contracting cells</p> Signup and view all the answers

    Which valve is responsible for preventing backflow in the left side of the heart?

    <p>Mitral valve</p> Signup and view all the answers

    What is the function of papillary muscles in the heart?

    <p>Pull chordae tendineae</p> Signup and view all the answers

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

    <p>To detect heart rhythm abnormalities</p> Signup and view all the answers

    Which phase of the cardiac cycle involves the contraction of the ventricles to pump blood?

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

    Where is the SA node located in the heart?

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

    'Lub' sound during auscultation of the heart is associated with:

    <p>'Lub' is closing of atrioventricular valves</p> Signup and view all the answers

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