ECGs Made Easy 4th Edition Aehlert Test Bank
Test Bank for ECGs Made Easy 4th Edition Barbara J Aehlert, ISBN: 9780323069243
Table of Contents
Anatomy and Physiology
Basic Electrophysiology
Sinus Mechanisms
Atrial Rhythms
Junctional Rhythms
Ventricular Rhythms
Atrioventricular (AV) Blocks
Pacemaker Rhythms
Introduction to the 12-Lead ECG
Post-Test
ECGs Made Easy, 4th Edition
Instructor Questions Chapter 1 – Anatomy & Physiology
TRUE/FALSE
1. Stimulation of beta-adrenergic receptor sites will result in peripheral vasoconstriction.
ANS: F
Beta receptor sites are divided into beta1 and beta2. Beta1 receptors are found in the heart and kidneys. Stimulation of beta1 receptor sites in the heart results in increased heart rate, contractility, and, ultimately, irritability of cardiac cells. Stimulation of beta1 receptor sites in the kidneys results in the release of renin into the blood. Renin promotes the production of angiotensin, a powerful vasoconstrictor. Beta2 receptor sites are found in the arterioles of the heart, lungs, and skeletal muscle. Stimulation results in dilation. Stimulation of beta2 receptor sites in the smooth muscle of the bronchi results in dilation.
OBJ: Describe the effects of stimulation of alpha-receptors, beta-1-receptors,
beta-2- receptors, and dopaminergic receptors.
2. Blood pressure is the result of cardiac output and peripheral vascular resistance.
ANS: T
Blood pressure is equal to cardiac output multiplied by peripheral vascular resistance. Blood pressure is the force exerted by the circulating blood volume on the walls of the arteries. Peripheral vascular resistance is the resistance to the flow of blood determined by blood vessel diameter and the tone of the vascular musculature.
OBJ: Identify and define the components of cardiac output.
MULTIPLE CHOICE
3. 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: Distinguish between the apex and base of the heart.
