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What is the role of the sinoatrial (SA) node in the heart?

Practice Questions

Q1
What is the role of the sinoatrial (SA) node in the heart?
  1. To pump blood to the lungs
  2. To initiate the heartbeat
  3. To regulate blood pressure
  4. To close the heart valves

Questions & Step-by-Step Solutions

What is the role of the sinoatrial (SA) node in the heart?
  • Step 1: Understand that the heart has a special part called the sinoatrial (SA) node.
  • Step 2: Know that the SA node is located in the right atrium of the heart.
  • Step 3: Learn that the SA node generates electrical signals.
  • Step 4: Realize that these electrical signals cause the heart to beat.
  • Step 5: Remember that the SA node is often called the 'natural pacemaker' because it controls the timing of the heartbeats.
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