Cardiac Conduction Quiz

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Questions and Answers

Which part of the heart is responsible for sending the electrical impulses that start the heartbeat?

  • Atrioventricular node
  • Sinoatrial node (correct)
  • Purkinje fibers
  • Bundle of His

Where is the Sinoatrial node located?

  • Left ventricle
  • Left atrium
  • Right ventricle
  • Right atrium (correct)

What is the function of the Bundle of His?

  • It sends the electrical impulses that start the heartbeat (correct)
  • It controls the heart rate
  • It controls blood flow through the heart and body
  • It is responsible for expanding and contracting different parts of the heart

Which part of the heart is sometimes called the heart's natural pacemaker?

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

What controls how fast or slowly the Sinoatrial node sends electrical signals?

<p>Autonomic nervous system (B)</p> Signup and view all the answers

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Study Notes

Heart's Electrical System

  • The Sinoatrial (SA) node is responsible for sending electrical impulses that start the heartbeat, making it the heart's natural pacemaker.
  • The SA node is located in the right atrium, the upper right chamber of the heart.

Bundle of His Function

  • The Bundle of His is a group of specialized fibers that carries electrical impulses from the SA node to the ventricles, allowing the ventricles to contract and pump blood.

SA Node Regulation

  • The autonomic nervous system controls how fast or slowly the SA node sends electrical signals, regulating heart rate based on the body's needs.

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