(Complete ECGs Made Easy, 9th Edition by Barbara J Aehlert, 100%
verified Exam Questions and Answers |Newest 2025/2026)
MULTIPLE CHOICES
1. The anterior surface of the heart consists primarily of the _____.
a. left atrium
b. right atrium
c. left ventricle
d. right ventricle
ANS: D
The front (anterior) surface of the heart lies behind the sternum and costal cartilages. It is
formed by portions of the right atrium and the left and right ventricles. However, because
the
heart is tilted slightly toward the left in the chest, the right ventricle is the area of the heart
that
lies most directly behind the sternum.
OBJ: Identify the surfaces of the heart.
2. Blood pressure is determined by _____ multiplied by _____.
1
,a. stroke volume; heart rate
b. heart rate; cardiac output
c. cardiac output; peripheral vascular resistance
d. stroke volume; peripheral vascular resistance
ANS: C
Blood pressure is equal to cardiac output multiplied by peripheral vascular resistance.
OBJ: Identify and explain the components of blood pressure and cardiac output.
3. The right atrium receives venous blood from the head, neck, and thorax via the
_____, from
the remainder of the body via the _____, and from the heart via the _____.
a. coronary sinus; superior vena cava; inferior vena cava
b. superior vena cava; coronary sinus; inferior vena cava
c. inferior vena cava; superior vena cava; coronary sinus
d. superior vena cava; inferior vena cava; coronary sinus
ANS: D
The right atrium receives blood low in oxygen from the superior vena cava, which carries
blood from the head and upper extremities; the inferior vena cava, which carries blood
from
the lower body; and the coronary sinus, which is the largest vein that drains the heart.
OBJ: Identify and describe the chambers of the heart and the vessels that enter or leave
each.
2
,4. The heart is divided into _____ chambers but functions as a _____-sided pump.
a. two; four
b. three; two
c. four; two
d. four; three
ANS: C
The heart has four chambers: two atria and two ventricles. The right and left sides of the
heart
are separated by an internal wall of connective tissue called a septum. The interatrial
septum
separates the right and left atria. The interventricular septum separates the right and left
ventricles. The septa separate the heart into two functional pumps. The right atrium and
right
ventricle make up one pump. The left atrium and left ventricle make up the other.
OBJ: Identify and describe the chambers of the heart and the vessels that enter or leave
each.
5. Stimulation of alpha1 receptors results in _____.
a. increased heart rate
b. peripheral vasoconstriction
c. constriction of bronchial smooth muscle
d. increased force of myocardial contraction
ANS: B
3
, Alpha1 receptors are found in the eyes, blood vessels, bladder, and male reproductive
organs.
Stimulation of alpha1 receptor sites results in constriction.
OBJ: Compare and contrast the effects of sympathetic and parasympathetic stimulation of
the heart
6. The apex of the heart is formed by the _____.
a. tip of the left ventricle
b. tip of the right atrium
c. right atrium and right ventricle
d. left atrium and left ventricle
ANS: A
The heart’s apex, or lower portion, is formed by the tip of the left ventricle. The apex lies just
above the diaphragm, between the fifth and sixth ribs, in the midclavicular line.
OBJ: Identify the surfaces of the heart.
7. The left atrium receives blood from the _____.
a. pulmonary veins
b. aorta
c. pulmonary arteries
d. inferior vena cava
ANS: A
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