The alveoli of mammalian lungs do not contain 20.9% O2 (that is, the percentage of O2 in atmospheric dry air) because A. there is dead space in the trachea and bronchial tree and the air in the lungs is humidified. B. mammals do not normally ventilate the lungs at a high enough rate. C. the trachea and bronchi are too small in volume to contain this amount of O2. D. mammal lungs have too many alveoli to ventilate. E. some O2 has been exchanged with the blood before reaching the alveoli.
The alveoli of mammalian lungs do not contain 20.9% O2 (that is, the percentage of O2 in atmospheric dry air) because A. there is dead space in the trachea and bronchial tree and the air in the lungs is humidified. B. mammals do not normally ventilate the lungs at a high enough rate. C. the trachea and bronchi are too small in volume to contain this amount of O2. D. mammal lungs have too many alveoli to ventilate. E. some O2 has been exchanged with the blood before reaching the alveoli.
Concepts of Biology
1st Edition
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:Samantha Fowler, Rebecca Roush, James Wise
Chapter16: The Body's System
Section: Chapter Questions
Problem 12RQ: The respiratory system_______. a. provides body tissues with oxygen b. provides body tissues with...
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The alveoli of mammalian lungs do not contain 20.9% O2 (that is, the percentage of O2 in atmospheric dry air) because
A. |
there is dead space in the trachea and bronchial tree and the air in the lungs is humidified. |
|
B. |
mammals do not normally ventilate the lungs at a high enough rate. |
|
C. |
the trachea and bronchi are too small in volume to contain this amount of O2. |
|
D. |
mammal lungs have too many alveoli to ventilate. |
|
E. |
some O2 has been exchanged with the blood before reaching the alveoli. |
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