ECGs Made Easy 6th Edition by Barbara J. Aehlert Test Bank | Questions and Answers | Complete Exam Prep

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ECGs MADE EASY
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6TH EDITION | AEHLERT
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TEST BANK f f

,ECGs Made Easy 6th Edition by Barbara Aehlert Test Bank
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Table of Contents:
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Chapter 1. Anatomy & Physiology
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Chapter 2. Basic Electrophysiology
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Chapter 3. Sinus Mechanisms
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Chapter 4. Atrial Rhythms
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Chapter 5. Junctional Rhythms
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Chapter 6. Ventricular Rhythms
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Chapter 7. Atrioventricular Blocks
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Chapter 8. Pacemaker Rhythms
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Chapter 9. Introduction to the 12-Lead ECG
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Chapter 10. Post-Test
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,Chapter 01: Anatomy and Physiology
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Aehlert: ECGs Made Easy, 6th Edition
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MULTIPLE CHOICE ff




1. The apex of the heart is formed by the
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a. tip of the left ventricle
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b. tip of the right atrium
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c. right atrium and right ventricle
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d. left atrium and left ventricle
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ANS: A ff


The heart’s apex, or lower portion, is formed by the tip of the left ventricle. The apex lies just
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above the diaphragm, between the fifth and sixth ribs, in the midclavicular line.
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OBJ: f f Identify the surfaces of the heart. ff ff ff ff ff




2. The left atrium receives blood from the
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a. pulmonary veins ff


b. aorta
c. pulmonary arteries ff


d. inferior vena cava ff ff




ANS: A ff


The left atrium receives freshly oxygenated blood from the lungs via the right and left
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pulmonary veins.
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OBJ: f f Identify and describe the chambers of the heart and the vessels that enter or leave each.
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3. The anterior surface of the heart consists primarily of the
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a. left atrium ff


b. right atrium ff


c. left ventricle ff


d. right ventricle ff




ANS: D ff


The front (anterior) surface of the heart lies behind the sternum and costal cartilages. It is
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formed by portions of the right atrium and the left and right ventricles. However, because
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the heart is tilted slightly toward the left in the chest, the right ventricle is the area of the
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heart that lies most directly behind the sternum.
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OBJ: f f Identify the surfaces of the heart. ff ff ff ff ff




4. Blood pressure is determined by
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a. stroke volume; heart rate ff ff ff


b. heart rate; cardiac output ff ff ff


c. cardiac output; peripheral vascular resistance
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d. stroke volume; peripheral vascular resistance
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ANS: C ff


Blood pressure is equal to cardiac output multiplied by peripheral vascular resistance.
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, OBJ: f f Identify and explain the components of blood pressure and cardiac output.
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5. The right atrium receives venous blood from the head, neck, and thorax via the
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the remainder of the body via the
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a. coronary sinus; superior vena cava; inferior vena cava ff ff ff ff ff ff ff


b. superior vena cava; coronary sinus; inferior vena cava ff ff ff ff ff ff ff


c. inferior vena cava; superior vena cava; coronary sinus
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d. superior vena cava; inferior vena cava; coronary sinus ff ff ff ff ff ff ff




ANS: D ff


The right atrium receives blood low in oxygen from the superior vena cava, which carries
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blood from the head and upper extremities; the inferior vena cava, which carries blood from
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the lower body; and the coronary sinus, which is the largest vein that drains the heart.
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OBJ: f f Identify and describe the chambers of the heart and the vessels that enter or leave each.
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6. The heart is divided into
ff ff ff ff chambers but functions as a ff ff ff ff -sided pump. ff


a. two; four ff


b. three; two ff


c. four; two ff


d. four; three ff




ANS: C ff


The heart has four chambers: two atria and two ventricles. The right and left sides of the heart
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are separated by an internal wall of connective tissue called a septum. The interatrial
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septum separates the right and left atria. The interventricular septum separates the right and
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left ventricles. The septa separate the heart into two functional pumps. The right atrium and
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right ventricle make up one pump. The left atrium and left ventricle make up the other.
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OBJ: f f Identify and describe the chambers of the heart and the vessels that enter or leave each.
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7. Stimulation of alpha1 receptors results in ff ff ff ff ff .
a. increased heart rate ff ff


b. peripheral vasoconstriction ff


c. constriction of bronchial smooth muscle ff ff ff ff


d. increased force of myocardial contraction ff ff ff ff




ANS: B ff


Alpha1 receptors are found in the eyes, blood vessels, bladder, and male reproductive organs.
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Stimulation of alpha1 receptor sites results in constriction.
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OBJ: f f Compare and contrast the effects of sympathetic and parasympathetic stimulation of the heart.
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8. Which side of the heart is a low-pressure system that pumps venous blood to the lungs?
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a. Left
b. Right
ANS: B ff


The job of the right side of the heart is to pump unoxygenated blood to and through the
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lungs to the left side of the heart. This is called the pulmonary circulation. The right side of
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the heart is a low-pressure system.
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