Cardio 17

What is the function of the right-side pump of the heart?

• It is a high pressure system that pumps oxygenated blood through the systemic circulation.

• It is a low pressure system that receives deoxygenated blood and pumps it through the lungs.

• It separates the right and left sides of the heart.

• It directs the flow of blood through the heart chambers.

Answer explanation

The right-side pump of the heart is a low pressure system that receives deoxygenated blood from the body and pumps it to the lungs for oxygenation, distinguishing it from the left side, which handles oxygenated blood.

How does the left-side pump of the heart function?

• It receives deoxygenated blood and pumps it through the lungs.

• It is a low pressure system that directs blood flow.

• It receives oxygenated blood from the lungs and pumps it through the systemic circulation.

• It separates the right and left sides of the heart.

Answer explanation

The left-side pump of the heart receives oxygenated blood from the lungs and pumps it through the systemic circulation, delivering oxygen to the body's tissues.

What is the purpose of the cardiac valves in the heart?

• They pump deoxygenated blood through the lungs.

• They separate the right and left sides of the heart.

• They direct the flow of blood through the heart chambers.

• They receive oxygenated blood from the lungs.

Answer explanation

The cardiac valves ensure unidirectional blood flow through the heart chambers, preventing backflow and maintaining efficient circulation. This is crucial for proper heart function.

Through which valve does blood leave the right ventricle to enter the pulmonary artery?

• Tricuspid valve

• Mitral valve

• Pulmonic valve

• Aortic valve

Answer explanation

Blood leaves the right ventricle through the pulmonic valve, which directs it into the pulmonary artery for oxygenation. The tricuspid valve is between the right atrium and ventricle, while the mitral and aortic valves are on the left side.

Why is the pulmonary artery unique compared to other arteries?

• It carries oxygenated blood.

• It carries deoxygenated blood.

• It connects directly to the left atrium.

• It does not connect to the heart.

Answer explanation

The pulmonary artery is unique because it carries deoxygenated blood from the heart to the lungs, unlike other arteries that typically carry oxygenated blood. This is essential for oxygenating the blood before it returns to the heart.

What is the function of the mitral valve in the heart?

• It receives deoxygenated blood from the body.

• It controls the flow of blood from the left atrium to the left ventricle.

• It pumps blood into the pulmonary arteries.

• It ejects blood into the aorta.

Answer explanation

The mitral valve controls blood flow from the left atrium to the left ventricle, ensuring that oxygenated blood moves efficiently into the ventricle for distribution to the body.

What is the correct sequence of blood flow through the heart starting from the right atrium?

• Right atrium → Right ventricle → Lungs → Left atrium → Left ventricle → Body

• Right ventricle → Right atrium → Lungs → Left ventricle → Left atrium → Body

• Right atrium → Left atrium → Right ventricle → Left ventricle → Lungs → Body

• Right ventricle → Lungs → Right atrium → Left ventricle → Left atrium → Body

Answer explanation

The correct sequence starts at the right atrium, flows to the right ventricle, then to the lungs for oxygenation, returns to the left atrium, moves to the left ventricle, and finally pumps oxygenated blood to the body.

Through which vessel does blood leave the left ventricle to supply the body?

• Pulmonary artery

• Vena cava

• Aorta

• Pulmonary vein

Answer explanation

Blood leaves the left ventricle through the aorta, which is the main artery supplying oxygenated blood to the body. The pulmonary artery carries blood to the lungs, while the vena cava returns deoxygenated blood to the heart.

Which chamber of the heart receives oxygenated blood from the lungs?

• Right atrium

• Left atrium

• Right ventricle

• Left ventricle

Answer explanation

The left atrium receives oxygenated blood from the lungs via the pulmonary veins, while the right atrium receives deoxygenated blood from the body. Therefore, the correct answer is the left atrium.

Which of the following structures carries oxygenated blood?

• Right ventricle

• Left atrium

• Pulmonary artery

• Inferior vena cava

Answer explanation

The left atrium carries oxygenated blood from the lungs to the heart. In contrast, the right ventricle pumps deoxygenated blood to the lungs, the pulmonary artery carries deoxygenated blood, and the inferior vena cava returns deoxygenated blood to the heart.