TEST BANK For ECGs Made Easy, 7th Edition by Barbara J Aehlert, All Chapters 1 - 10, Complete Newest Version
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ECGs Made Easy, 7th Edition Aehlert
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ECGs Made Easy, 7th Edition Aehlert
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TEST BANK For ECGs Made Easy, 7th Edition by Barbara J Aehlert, All Chapters 1 - 10, Complete Newest Version
TEST BANK For ECGs Made Easy, 7th Edition by Barbara J Aehlert, All Chapters 1 - 10, Complete Newest Version
TEST BANK For ECGs Made Easy, 7th Edition by Barbara J Aehlert, All Chapters 1 ...
• The apex of the heart is formed by the .
• tip of the left ventricle
• tip of the right atrium
• right atrium and right ventricle
• left atrium and left ventricle
ANSWER: 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.
• The left atrium receives blood from the .
• pulmonary veins
• aorta
• pulmonary arteries
• inferior vena cava
ANSWER: A
The left atrium receives freshly oxygenated blood from the lungs via the right and left
pulmonary veins.
OBJ: Identify and describe the chambers of the heart and the vessels that enter or leave each.
• The anterior surface of the heart consists primarily of the .
• left atrium
, • right atrium
• left ventricle
• right ventricle
ANSWER: 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.
• Blood pressure is determined by multiplied by .
• stroke volume; heart rate
• heart rate; cardiac output
• cardiac output; peripheral vascular resistance
• stroke volume; peripheral vascular resistance
ANSWER: 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.
• 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 .
• coronary sinus; superior vena cava; inferior vena cava
• superior vena cava; coronary sinus; inferior vena cava
• inferior vena cava; superior vena cava; coronary sinus
• superior vena cava; inferior vena cava; coronary sinus
ANSWER: 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.
• The heart is divided into chambers but functions as a -sided pump.
• two; four
• three; two
• four; two
• four; three
ANSWER: 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.
• Stimulation of alpha1 receptors results in .
• increased heart rate
• peripheral vasoconstriction
, • constriction of bronchial smooth muscle
• increased force of myocardial contraction
ANSWER: B
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.
• Which side of the heart is a low-pressure system that pumps venous blood to the lungs?
• Left
• Right
ANSWER: B
The job of the right side of the heart is to pump unoxygenated blood to and through the lungs
to the left side of the heart. This is called the pulmonary circulation. The right side of the
heart is a low-pressure system.
OBJ: Identify and describe the chambers of the heart and the vessels that enter or leave each.
• Which side of the heart is a high-pressure system that pumps arterial blood to the
systemic circulation?
• Left
• Right
ANSWER: A
The left side of the heart is a high-pressure pump. The job of the left heart is to receive
oxygenated blood and pump it out to the rest of the body. This is called the systemic
circulation. The left ventricle is a high-pressure chamber. Its wall is much thicker than the
right ventricle (the right ventricle is 3 to 5 mm thick; the left ventricle is 13 to 15 mm thick).
This is because the left ventricle must overcome a lot of pressure and resistance from the
arteries and contract forcefully in order to pump blood out to the body.
OBJ: Identify and describe the chambers of the heart and the vessels that enter or leave each.
• The thick, muscular middle layer of the heart wall that contains the atrial and
ventricular muscle fibers necessary for contraction is the .
• epicardium
• pericardium
• myocardium
• endocardium
ANSWER: C
The myocardium (middle layer) is a thick, muscular layer that consists of cardiac
muscle fibers (cells) responsible for the pumping action of the heart.
OBJ: Describe the structure and function of the coverings of the heart.
• Blood flows from the right atrium through the valve into the right ventricle.
• mitral
• aortic
• pulmonic
• tricuspid
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