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What is the primary pacemaker of the heart?

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Question: What is the primary pacemaker of the heart?

Options:

  1. Atrioventricular node
  2. Bundle of His
  3. Sinoatrial node
  4. Purkinje fibers

Correct Answer: Sinoatrial node

Solution: 

The sinoatrial (SA) node is the primary pacemaker of the heart, initiating the heartbeat.

What is the primary pacemaker of the heart?

Practice Questions

Q1
What is the primary pacemaker of the heart?
  1. Atrioventricular node
  2. Bundle of His
  3. Sinoatrial node
  4. Purkinje fibers

Questions & Step-by-Step Solutions

What is the primary pacemaker of the heart?
  • Step 1: Understand that the heart has a special part that controls its beating.
  • Step 2: This special part is called the sinoatrial (SA) node.
  • Step 3: The SA node is located in the right atrium of the heart.
  • Step 4: The SA node sends electrical signals that make the heart muscles contract.
  • Step 5: These signals start the heartbeat and keep it regular.
  • Step 6: Because it starts the heartbeat, the SA node is called the primary pacemaker of the heart.
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