Human Heart and Its Working CDS Questions

CDS Biology

Human Heart and Its Working MCQ Questions


1.
The human heart is enclosed within a protective, double-layered membranous sac called the:
A.
Myocardium
B.
Peritoneum
C.
Endocardium
D.
Pericardium
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ANSWER :
D. Pericardium
2.
The middle, thick, muscular layer of the heart wall, responsible for generating the force needed to pump blood, is called the:
A.
Myocardium
B.
Pericardium
C.
Mesocardium
D.
Endocardium
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ANSWER :
A. Myocardium
3.
The thin innermost lining of the heart's chambers, which is continuous with the lining of the major blood vessels, is called the:
A.
Endocardium
B.
Mesocardium
C.
Pericardium
D.
Myocardium
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ANSWER :
A. Endocardium
4.
The human heart is internally divided into how many separate chambers?
A.
Six chambers in total
B.
Three chambers in total
C.
Four (two atria and two ventricles)
D.
Two chambers in total
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ANSWER :
C. Four (two atria and two ventricles)
5.
The upper, comparatively smaller and thinner-walled chambers of the heart, which receive incoming blood, are called the:
A.
Valves
B.
Atria
C.
Ventricles
D.
Septa
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ANSWER :
B. Atria
6.
The lower, comparatively larger and thicker-walled chambers of the heart, which pump blood out to the lungs or to the rest of the body, are called the:
A.
Atria
B.
Sinuses
C.
Ventricles
D.
Valves
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ANSWER :
C. Ventricles