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What is the function of the sinoatrial (SA) node?

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Question: What is the function of the sinoatrial (SA) node?

Options:

  1. To contract the ventricles
  2. To initiate the heartbeat
  3. To regulate blood pressure
  4. To filter blood

Correct Answer: To initiate the heartbeat

Solution: 

The sinoatrial (SA) node is known as the heart\'s natural pacemaker, initiating the heartbeat.

What is the function of the sinoatrial (SA) node?

Practice Questions

Q1
What is the function of the sinoatrial (SA) node?
  1. To contract the ventricles
  2. To initiate the heartbeat
  3. To regulate blood pressure
  4. To filter blood

Questions & Step-by-Step Solutions

What is the function of the sinoatrial (SA) node?
  • Step 1: Understand that the heart has a special group of cells that control its beating.
  • Step 2: Identify that this group of cells is called the sinoatrial (SA) node.
  • Step 3: Learn that the SA node is located in the right atrium of the heart.
  • Step 4: Recognize that the SA node sends electrical signals to make the heart muscles contract.
  • Step 5: Conclude that because of the SA node, the heart beats regularly and keeps blood flowing.
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