Egan's Testbank Chapter 11 Questions and Answers well Explained Latest 2024/2025 Update 100% Correct.

Egan's Testbank Chapter 11
1. What is the primary function of the lungs?
a. Convert angiotensin I to angiotensin II.
b. Filter pulmonary blood.
c. Gas exchange.
d. Remove carbon monoxide (CO). - ✔️✔️Gas exchange.



2. In order to inspire to a lung volume greater than approximately 70% of TLC, the
inspiratory muscles must overcome:
a.
the recoil of the lungs.
b.
the recoil of both the lungs and the chest wall.
c.
the recoil of both the chest walls.
d.
the recoil of the alveoli. - ✔️✔️the recoil of both the lungs and the chest wall.




3. For healthy individuals at rest, which of the following statements about exhalation is
true?
a.
Exhalation will be passive, due to inspiratory stored potential energy.
b.
Exhalation will only require 40% of the energy expended for inspiration.
c.
Exhalation will be the result of accessory respiratory muscle use.
d.
Exhalation will generally take half the time of inspiration. - ✔️✔️Exhalation will be
passive, due to inspiratory stored potential energy


4. Which of the following pressures normally remains negative (relative to atmospheric
pressure) during quiet breathing?
a. Palv
b. Ppl
c. Pao
d. Pbs - ✔️✔️Ppl

,5. Given a constant resistance, how will increasing the compliance of a lung unit alter
gas movement into and out of the alveolus?
a.
Both filling and emptying will be slower.
b.
The alveolus will fill and empty more quickly.
c.
The alveolus will fill more quickly but empty more slowly.
d.
The alveolus will fill more slowly but empty more quickly. - ✔️✔️Both filling and
emptying will be slower.


6. Which of the following pressure gradients is responsible for maintaining alveolar
inflation?
a.
Transpulmonary pressure gradient (Palv - Ppl)
b.
Transthoracic pressure gradient (Ppl - Pbs)
c.
Transcardiac pressure gradient (Pca - Palv)
d.
Transrespiratory pressure gradient (Palv - Pao) - ✔️✔️Transpulmonary pressure
gradient (Palv - Ppl)

7. Which of the following statements about alveolar pressure (Palv) during normal quiet
breathing is true?
a.
It is positive during inspiration and negative during expiration.
b.
It is the same as intrapleural pressure (Ppl).
c.
It is negative during inspiration and positive during expiration.
d.
It always remains less than atmospheric pressure. - ✔️✔️It is negative during
inspiration and positive during expiration.

8. What happens during normal inspiration?
1. The Ppl increases further below atmospheric pressure.
2. The transpulmonary pressure gradient widens.
3. Palv drops below that at the airway opening.
a. 1 and 2 only
b. 2 and 3 only
c. 1 only
d. 1 and 3 only - ✔️✔️2 and 3 only

, 9. During normal tidal ventilation, the transpulmonary pressure gradient (Palv - Ppl)
reaches its maximum value at what point in the cycle?
a.
Midinspiration
b.
End-expiration
c.
End-inspiration
d.
Mid-expiration - ✔️✔️End-inspiration

10. During expiration, why does gas flow out from the lungs to the atmosphere?
a.
Palv is less than at the airway opening.
b.
Palv is the same as at the airway opening.
c.
Palv is greater than at the airway opening.
d.
Airway pressure is greater than Palv. - ✔️✔️Palv is greater than at the airway opening.

11. What is the primary function of the lungs?
a. Convert angiotensin I to angiotensin II.
b. Filter pulmonary blood.
c. Gas exchange.
d. Remove carbon monoxide (CO). - ✔️✔️Gas exchange.



1. What is the primary function of the lungs?
a. Convert angiotensin I to angiotensin II.
b. Filter pulmonary blood.
c. Gas exchange.
d. Remove carbon monoxide (CO). - ✔️✔️Gas exchange.


12. What term is used to note the difference between inspiratory lung volume and
expiratory lung volume at any given pressure?
a.
Alveolar aphasia
b.
Hysteresis
c.
Pleural pressure variance
d.
Transpulmonary pressures - ✔️✔️Hysteresis