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Chapter 41: Oxygenation v v
Fundamentals of Nursing, 9th Edition v v v v
v MULTIPLE CHOICE v
1. A nurse is teaching staff about the conduction of the heart. In which order will the nurse
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present the conduction cycle, starting with the first structure?
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1. Bundle of His v v
2. Purkinje network v
3. Intraatrial pathways v
4. Sinoatrial (SA) node v v
5. Atrioventricular (AV) node v v
a. 5, 4, 3, 2, 1
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b. 4, 3, 5, 1, 2
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c. 4, 5, 3, 1, 2
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d. 5, 3, 4, 2, 1
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ANS: B v
The conduction system originates with the SA node, the “pacemaker” of the heart. The electrical
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impulses are transmitted through the atria along intraatrial pathways to the AV node. It assists
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atrial emptying by delaying the impulse before transmitting it through the Bundle of His and the
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ventricular Purkinje network.
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2. A nurse is teaching the patient with mitral valve problems about the valves in the heart.
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Starting on the right side of the heart, describe the sequence of the blood flow through these
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valves.
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1. Mitral
2. Aortic
3. Tricuspid
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, FUNDAMENTALS OF NURSING 9TH EDITION POTTER TEST v v v v v v
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4. Pulmonic
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a. 1, 3, 2, 4 v v v
b. 4, 3, 2, 1 v v v
c. 3, 4, 1, 2 v v v
d. 2, 4, 1, 3 v v v
ANS: C v
The blood flows through the valves in the following direction: tricuspid, pulmonic, mitral, and
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aortic.
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3. A nurse explains the function of the alveoli to a patient with respiratory problems. Which
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information about the alveoli’s function will the nurse share with the patient?
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a. Carries out gas exchangev v v
b. Regulates tidal volume v v
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c. Produces hemoglobin v
d. Stores oxygen v
ANS: A v
The alveolus is a capillary membrane that allows gas exchange of oxygen and carbon dioxide
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during respiration. The alveoli do not store oxygen, regulate tidal volume, or produce
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hemoglobin.
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4. A nurse auscultates heart sounds. When the nurse hears S2, which valves is the nurse hearing
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close?
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a. Aortic and mitral v v
b. Mitral and tricuspidv v
c. Aortic and pulmonic v v
d. Mitral and pulmonic v v
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ANS: C v
As the ventricles empty, the ventricular pressures decrease, allowing closure of the aortic and
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pulmonic valves, producing the second heart sound, S2. The mitral and tricuspid produce the first
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heart sound, S1. The aortic and mitral do not close at the same time. The mitral and pulmonic do
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not close at the same time.
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5. The nurse is teaching about the process of exchanging gases through the alveolar capillary
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membrane. Which term will the nurse use to describe this process?
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a. Ventilation
b. Surfactant
c. Perfusion
d. Diffusion
ANS: D v
Diffusion is the process of gases exchanging across the alveoli and capillaries of body
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tissues.Ventilation is the process of m o v Ni nUgRgSaI Ns eGs Ti Bn .t Co OaMn d out of the lungs. Surfactant is a
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chemical produced in the lungs to maintain the surface tension of the alveoli and keep them from
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collapsing. Perfusion is the ability of the cardiovascular system to carry oxygenated blood to
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tissues and return deoxygenated blood to the heart.
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6. A nurse is caring for a patient who was in a motor vehicle accident that resulted in cervical
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trauma to C4. Which assessment is the priority?
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a. Pulse
b. Respirations
c. Temperature
d. Blood pressure v
ANS: B v
Respirations and oxygen saturation are the priorities. Cervical trauma at C3 to C5 usually results
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in paralysis of the phrenic nerve. When the phrenic nerve is damaged, the diaphragm does not
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descend properly, thus reducing inspiratory lung volumes and causing hypoxemia. While pulse
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