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The nurse is discussing the blood flow pattern of the heart. The nurse should recognize which of the following as the accurate blood flow pattern of the heart?

Aorta-Right atrium-right ventricle-pulmonary vein-lungs- pulmonary artery left atrium-left ventricle

vena cava-right atrium-right ventricle-pulmonary vein-lungs- pulmonary artery-left atrium-left ventricle

vena cava→ right atrium-right ventricle-pulmonary artery-lungs- pulmonary vein-left atrium-left ventricle

Aorta-right atrium-right ventricle-lungs-pulmonary vein-left atrium-left ventricle- vena cava

Answer and Explanation

The Correct Answer is C

In this sequence:

Vena cava brings deoxygenated blood from the body into the right atrium.

Blood flows from the right atrium to the right ventricle through the tricuspid valve.

The right ventricle pumps blood into the pulmonary artery to the lungs.

In the lungs, blood is oxygenated and returns to the heart via the pulmonary veins into the left atrium.

From the left atrium, blood moves to the left ventricle through the bicuspid (mitral) valve.

The left ventricle then pumps oxygenated blood into the body through the aorta.

This sequence represents the systemic and pulmonary circulation of the heart.

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Correct Answer is A

Explanation

A. AV node - SA node - bundle of His - bundle branches:

This sequence is incorrect. The SA node (sinoatrial node) initiates the electrical impulse in the heart, followed by the AV node (atrioventricular node), bundle of His, and then the bundle branches.

B. SA node - AV node - bundle of His - bundle branches:

This sequence is correct. The electrical stimulus of the cardiac cycle starts at the SA node, which is the natural pacemaker of the heart. From the SA node, the impulse travels to the AV node, then to the bundle of His, and finally to the bundle branches, which distribute the impulse to the ventricles, causing them to contract.

C. Bundle of His - AV node - SA node - Erb's Point:

This sequence is incorrect. Erb's Point is a point on the chest where heart sounds S2 and S3 can be heard most distinctly.

D. AV node - SA node - bundle of His - Erb's Point:

This sequence is incorrect. The AV node comes after the SA node in the electrical conduction system of the heart. Erb's Point is not a part of the normal cardiac conduction pathway; it is a location for auscultation on the chest.

Correct Answer is {"dropdown-group-1":"C"}

Explanation

The pacemaker of the heart is known as the sinoatrial (SA) node. The SA node is a specialized group of cells located in the right atrium of the heart. It generates electrical impulses that initiate each heartbeat and set the rhythm for the entire heart.

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The nurse is discussing the blood flow pattern of the heart. The nurse should recognize which of the following as the accurate blood flow pattern of the heart?

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Naxlex Comprehensive Predictor Exams

The nurse is reviewing the sequence of the cardiac cycle. The nurse recognizes that the electrical stimulus of the cardiac cycle follows which sequence?

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Explanation

A group of nursing students are studying the conduction system of the heart. The nursing students should recognize that the pacemaker of the heart is known as dropdown

Correct Answer is {"dropdown-group-1":"C"}

Explanation

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