21) Which structure contains deoxygenated blood? A) left atrium B) left ventricle C) : 1380954

21) Which structure contains deoxygenated blood?
A) left atrium
B) left ventricle
C) : 1380954.



21) Which structure contains deoxygenated blood?

A) left atrium

B) left ventricle

C) aorta

D) pulmonary vein

E) pulmonary artery


22) A heart murmur would be associated with the malfunction of which structure?

A) aorta

B) pacemaker

C) heart muscle

D) atrioventricular valves

E) heart epithelial tissue


23) Which chamber of the heart receives blood from the lungs?

A) left ventricle

B) right ventricle

C) left atrium

D) right atrium


24) Which vein in the body carries oxygenated blood?

A) coronary vein

B) superior vena cava

C) inferior vena cava

D) pulmonary vein

E) Veins never carry oxygenated blood.


25) Nerve-like muscle cells that function as the heart’s pacemaker are found in the:

A) left ventricle.

B) right ventricle.

C) coronary arteries.

D) atrioventricular valves.

E) sinoatrial node.

26) When a doctor uses a stethoscope to listen to your heart and hears the lub-dub sound, she is actually listening to the:

A) valves in the heart closing.

B) blood surging through the arteries.

C) contraction of the cardiac muscle in the ventricles.

D) electrical signals that control heartbeat.


27) Which chamber of the heart is connected to the aorta?

A) right ventricle

B) left ventricle

C) right atrium

D) left atrium


28) Why is the left side of the heart stronger than the right side of the heart?

A) The left side pumps blood to the right side of the body, which has more muscle mass.

B) The left side receives more oxygen from the lungs.

C) The right side pumps only to the lungs, and the left side pumps blood around the whole body.

D) The right side pumps blood only to the brain, and the left side pumps blood around the whole body.


29) The coronary arteries that bring blood to the heart branch off from the:

A) aorta.

B) vena cava.

C) pulmonary artery.

D) pulmonary vein.


30) Which factor contributes to plaque formation in coronary arteries?

A) inflammation of the lining where LDLs have attached

B) inflammation of the lining where HDLs have attached

C) protein deposits in the interior

D) fat cells clogging the interior


21) Which structure contains deoxygenated blood?
A) left atrium
B) left ventricle
C) : 1380954

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