Coronary Circulation Overview
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Questions and Answers

Where does the left side of the heart pump blood through?

  • Body systemically (correct)
  • Liver
  • Heart chambers
  • Lungs
  • Which part of the heart is directed inferiorly to the left?

  • Mediastinum
  • Apex (correct)
  • Base
  • Ventricles
  • What is the purpose of pulmonary circulation?

  • Pump blood through miles of blood vessels in the body systemically
  • Supply oxygen to the brain
  • Pick up oxygen and unload carbon dioxide in the lungs (correct)
  • Exchange materials with body cells
  • Where is the heart located within the thoracic cavity?

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

    What type of circulation does the right side of the heart perform?

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

    Which part of the thoracic cavity houses the heart?

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

    What is the function of systemic circulation?

    <p>Deliver nutrients and oxygen to body tissues</p> Signup and view all the answers

    Which direction is the base of the heart positioned?

    <p><strong>Superiorly to the right</strong></p> Signup and view all the answers

    What sets the rhythm of electrical excitation in the heart's conduction system?

    <p>Sinoatrial (SA) node</p> Signup and view all the answers

    Which part of the heart is located in the interventricular septum?

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

    During which phase of the action potential does depolarization occur in cardiac muscle cells?

    <p>Resting phase</p> Signup and view all the answers

    What leads to the mechanical response of cardiac muscle contraction?

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

    Which structure ensures that the heart chambers contract in a coordinated manner?

    <p>Purkinje fibers</p> Signup and view all the answers

    What is the primary source of ATP for cardiac muscle cells?

    <p>Aerobic cellular respiration</p> Signup and view all the answers

    Which channels open during the plateau phase of the action potential in cardiac muscle cells?

    <p>Ca2+ channels</p> Signup and view all the answers

    What happens during repolarization in cardiac muscle cells?

    <p>K+ channels open and ions outflow from the cell</p> Signup and view all the answers

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