When an electrical impulse causes the heart muscle to squeeze it quizlet?

When an electrical impulse causes the heart muscle to squeeze it?

An electrocardiogram (ECG or EKG) is a test that checks how your heart is functioning by measuring the electrical activity of the heart. With each heart beat, an electrical impulse (or wave) travels through your heart. This wave causes the muscle to squeeze and pump blood from the heart.

In what order does an electrical impulse travel through the heart quizlet?

Name the cardiac conduction cycle events in order: The electrical impulse is initiated at the SA node. The impulse passes to the AV node, which is passed on the the AV bundle. The impulse is transmitted to the Purkinje fibers and the ventricles contract.

What is the electrical conduction system of the heart quizlet?

The cardiac conduction system is a group of specialized cardiac muscle cells in the walls of the heart that send signals to the heart muscle causing it to contract. The main components of the cardiac conduction system are the SA node, AV node, bundle of His, bundle branches, and Purkinje fibers.

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Which part of the heart’s conduction system sends the impulse that begins the process of conduction quizlet?

The heart’s electrical system

SA node (sinoatrial node) – known as the heart’s natural pacemaker. The impulse starts in a small bundle of specialized cells located in the right atrium, called the SA node. The electrical activity spreads through the walls of the atria and causes them to contract.

How does electrical conduction in the heart occur?

The sinus node generates an electrical stimulus regularly, 60 to 100 times per minute under normal conditions. The atria are then activated. The electrical stimulus travels down through the conduction pathways and causes the heart’s ventricles to contract and pump out blood.

What causes the electrical impulse in the heart?

The electrical signal starts in a group of cells at the top of your heart called the sinoatrial (SA) node. The signal then travels down through your heart, triggering first your two atria and then your two ventricles.

Where does the electrical impulse travel after leaving the AV bundle quizlet?

sending an impulse through both atria, causing them to contract and reach the AV node. The AV node continues the impulse, sending it down the bundle of his, right and left bundle branches, and into purkinje fibers within the ventricles causing both ventricles to contract.

What is the normal order of the electrical conduction pattern of the heart?

The cardiac conduction system comprises the following structures, in order, the SA node, the AV node, the bundle of His, the bundle branches, and the Purkinje fibers.

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What does the AV bundle do?

Function. The bundle of His is an important part of the electrical conduction system of the heart, as it transmits impulses from the atrioventricular node, located at the anterior-inferior end of the interatrial septum, to the ventricles of the heart.

Which of the following is the correct conduction pathway through the heart quizlet?

Which of the following is the correct conduction pathway through the heart? SA Node, AV Node, bundle of His, bundle branches, and Purkinje fibers.

Which component of the electrical conduction system is the pacemaker?

The SA node is sometimes called the heart’s “natural pacemaker.” When an electrical impulse is released from this natural pacemaker, it causes the atria to contract. The signal then passes through the atrioventricular (AV) node.

What are the parts of the conduction system of the heart quizlet?

The components of the cardiac conduction system include the SA node, the AV node, the AV bundle, the AV bundle branches, and the Purkinje cells.