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Questions and Answers
Which part of the heart is responsible for sending the electrical impulses that start the heartbeat?
Where is the Sinoatrial node located?
What is the function of the Bundle of His?
Which part of the heart is sometimes called the heart's natural pacemaker?
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What controls how fast or slowly the Sinoatrial node sends electrical signals?
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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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Description
Test your knowledge on cardiac conduction and the intricate network of nodes, cells, and signals that control your heartbeat. Understand how electrical signals travel through your heart, causing it to expand and contract, ultimately controlling blood flow. Explore the specialized cells within the cardiac conduction system and their vital role in keeping your heart functioning properly.
