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MechanicalVentilation
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7th Edition by Cairo
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,
,Chapter 1; Basic Terms and Concepts of Mechanical Ventilation
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Test Bank
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MULTIPLE CHOICE b
1. The body’s mechanism for conducting air in and out of the lungs is
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known as which of the following?
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a. External respiration b
b. Internal respiration b
c. Spontaneous ventilation b
d. Mechanical ventilation b
ANS: C b
The conduction of air in and out of the body is known as ventilation.
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Since the question asks for the body’s mechanism, this would be
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spontaneous ventilation. External respiration involves the exchange
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of oxygen (O2) and carbon dioxide (CO2) between the alveoli and the
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pulmonary capillaries. Internal respiration occurs at the cellular
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level and involves movement of oxygen from the systemic blood into
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the cells.
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DIF: 1 REF: pg. 3 b b
2. Which of the following are involved in external respiration?
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a. Red blood cells and body cells b b b b b
b. Scalenes and trapezius b b
muscles
c. Alveoli and pulmonary b b
capillaries
d. External oblique and b b
transverse abdominal muscles b b
ANS: C b
External respiration involves the exchange of oxygen and carbon
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dioxide (CO2) between the alveoli and the pulmonary capillaries.
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Internal respiration occurs at the cellular level and involves
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movement of oxygen from the systemic blood into the cells.
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Scalene and trapezius muscles are accessory muscles of inspiration.
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External oblique and transverse abdominal muscles are accessory
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muscles of expiration.
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, DIF: 1 REF: pg. 3 b b
3. The graph that shows intrapleural pressure changes during
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normal spontaneous breathing is depicted by which of the
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following?
b
a.
b.
c.
d.
ANS: B b
During spontaneous breathing the intrapleural pressure drops from
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about -5 cm H2O at end-expiration to about -10 cm H2O at end-
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inspiration. The graph depicted for answer B shows that change
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from -5 cm H2O to -10 cm H2O.
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DIF: 1 REF: pg. 4 b b
4. During spontaneous inspiration alveolar pressure (PA) is about:
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.
a. - 1 cm H2O b b b
b. +1 cm H2O b b b
c. 0 cm H2O b b
d. 5 cm H2O b b
ANS: A b
-1 cm H2O is the lowest alveolar pressure will become during normal
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spontaneous ventilation. During the exhalation of a normal
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spontaneous breath the alveolar pressure will become +1 cm H2O.
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DIF: 1 REF: pg. 3 b b
5. The pressure required to maintain alveolar inflation is known as
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which of the following?
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a. Transairway pressure (PTA ) b b b
b. Transthoracic pressure (PTT) b b
c. Transrespiratory pressure (PTR) b b
d. Transpulmonary pressure (PL) b b