Human Heart and Its Working CDS Questions

CDS Biology

Human Heart and Its Working MCQ Questions


7.
The heart is primarily composed of which type of muscle?
A.
Skeletal
B.
Smooth
C.
Cardiac
D.
Voluntary
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ANSWER :
C. Cardiac
8.
Which valve prevents backflow of blood into the left atrium?
A.
Tricuspid valve
B.
Mitral valve
C.
Aortic valve
D.
Pulmonary valve
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ANSWER :
B. Mitral valve
9.
Which artery carries oxygen-poor blood?
A.
Pulmonary artery
B.
Aorta
C.
Coronary artery
D.
Carotid artery
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ANSWER :
A. Pulmonary artery
10.
The largest artery in the body is?
A.
Aorta
B.
Pulmonary artery
C.
Coronary artery
D.
Carotid artery
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ANSWER :
A. Aorta
11.
What is the role of the coronary arteries?
A.
Transport hormones
B.
Supply oxygen to the heart
C.
Store blood
D.
Transport nutrients
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ANSWER :
B. Supply oxygen to the heart
12.
What initiates the heartbeat?
A.
Atrioventricular node
B.
Purkinje fibers
C.
Sinoatrial node
D.
Bundle of His
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ANSWER :
C. Sinoatrial node