Heart Anatomy and Physiology
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Questions and Answers

What is the primary function of the pericardium?

  • To stimulate the heart to contract
  • To protect and anchor the heart (correct)
  • To regulate the electrical activity of the heart
  • To pump blood through the heart

    • What type of muscle is found in the heart?

  • Skeletal muscle
  • Cardiac muscle (correct)
  • Smooth muscle
  • Voluntary muscle

    • What type of cells initiate the heartbeat?

  • Pacemaker cells
  • Sinoatrial cells
  • Cardiac cells
  • Autorhythmic cells (correct)

    • What is the sequence of excitation in the heart?

    <p>SA node, AV node, bundle of His, Purkinje fibers (D)</p> Signup and view all the answers

    What is the electrical conduction pathway in the heart?

    <p>SA node, AV node, bundle of His, Purkinje fibers, ventricles (A)</p> Signup and view all the answers

    What is the purpose of the atrioventricular (AV) node?

    <p>To delay the impulse transmission to the ventricles (D)</p> Signup and view all the answers

    What is the term for the amount of blood pumped by each ventricle in one minute?

    <p>Cardiac output (A)</p> Signup and view all the answers

    What is the sequence of excitation in the cardiac conduction pathway?

    <p>SA node, AV node, Bundle of His, Purkinje fibers (B)</p> Signup and view all the answers

    Which type of cells are capable of generating an electrical impulse without an external stimulus?

    <p>Autorhythmic cells (D)</p> Signup and view all the answers

    What is the name of the pathway that conducts electrical impulses from the AV node to the ventricles?

    <p>Bundle of His (A)</p> Signup and view all the answers

    Which part of the cardiac conduction pathway has the lowest intrinsic firing rate?

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

    What is the role of the SA node in the cardiac conduction pathway?

    <p>To generate an electrical impulse and stimulate the heart to contract (D)</p> Signup and view all the answers

    Where does the electrical impulse from the AV node travel to next?

    <p>Bundle of His (D)</p> Signup and view all the answers

    What is the name of the process by which the cardiac muscle contracts?

    <p>Excitation-contraction coupling (A)</p> Signup and view all the answers

    What is the purpose of the cardiac conduction pathway?

    <p>To stimulate the heart to contract (C)</p> Signup and view all the answers

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