HOYA QUESTIONS AND CORRECT ANSWERS WITH
DETAILED RATIONALES
1. How many chambers does the human heart contain?
A. 2
B. 3
C. 4
D. 5
Correct Answer: C
Rationale: The human heart has four chambers: two atria (right and left) and
two ventricles (right and left).
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2. The layer of simple squamous epithelium that lines the inside of the heart is
called:
A. Myocardium
B. Pericardium
C. Endocardium
D. Epicardium
Correct Answer: C
,Rationale: The endocardium is the innermost layer of the heart, consisting of
simple squamous epithelium that lines the chambers and valves.
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3. Blood transported by the pulmonary veins returns to the:
A. Left atrium
B. Right atrium
C. Right ventricle
D. Left ventricle
Correct Answer: A
Rationale: Pulmonary veins carry oxygenated blood from the lungs back to the
left atrium.
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4. Which of the following descriptions of the heart's location is correct?
A. The heart lies obliquely in the mediastinum
B. Its base is directed anteriorly and slightly superiorly
C. Its apex is directed posteriorly and slightly inferiorly
D. Two-thirds of the heart's mass lies to the right of the midline
Correct Answer: A
,Rationale: The heart lies obliquely in the mediastinum. The base is directed
posteriorly and superiorly, while the apex is directed anteriorly and inferiorly.
Two-thirds of the heart's mass lies to the left of the midline.
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5. The pulse is a direct reflection of the:
A. Cardiac output
B. Blood pressure
C. Venous return
D. Heart beat
Correct Answer: D
Rationale: The pulse is a direct reflection of the heart beat—specifically, the
ejection of blood from the left ventricle into the aorta.
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6. The audible sounds ("lub-dupp" sounds) that can be heard from the heart
are made by the:
A. Nodes
B. Ventricles
C. Atria
D. Valves
Correct Answer: D
, Rationale: Heart sounds are produced by the closing of heart valves. The "lub"
is the closing of AV valves, and "dupp" is the closing of semilunar valves.
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7. The valve located between the right atrium and the right ventricle is the:
A. Tricuspid valve
B. Bicuspid valve
C. Mitral valve
D. Semilunar valve
Correct Answer: A
Rationale: The tricuspid valve separates the right atrium from the right
ventricle.
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8. The bulk of the heart consists of:
A. Striated muscle
B. Cardiac muscle
C. Smooth muscle
D. Connective tissue
Correct Answer: B
Rationale: The myocardium, which makes up the bulk of the heart wall,
consists of cardiac muscle.