Asked by Liting Zheng on May 01, 2024
Verified
The composition of alveolar air differs from atmospheric air. Indicate all of the factors that account for this difference.
A) Nitrogen does not enter alveoli
B) Difference in overall (total) pressure
C) Presence of water vapor
D) Gas exchange adds CO2
E) Gas exchange removes O2
Alveolar Air
The air present within the alveoli, the tiny air sacs in the lungs where gas exchange with blood occurs.
Atmospheric Air
The mixture of gases surrounding the earth, primarily composed of nitrogen, oxygen, argon, carbon dioxide, and trace gases.
Water Vapor
The gaseous phase of water, forming clouds and contributing to the greenhouse effect.
- Recognize the factors that alter or affect the composition of alveolar air.
Verified Answer
DC
davit chanyoshviliMay 07, 2024
Final Answer :
C, D, E
Explanation :
The composition of alveolar air differs from atmospheric air mainly due to the presence of water vapor in the alveoli (C), the addition of carbon dioxide (CO2) from the blood into the alveoli (D), and the removal of oxygen (O2) from the alveoli into the blood (E). Nitrogen does enter the alveoli and the difference in overall pressure is not a factor in the composition difference.
Learning Objectives
- Recognize the factors that alter or affect the composition of alveolar air.