STANDARDZoology-Respiratory System
STANDARD Zoology Gas Exchange MCQ Question
Type: MCQ-conceptual-Medium
Which is true for CO₂ concentration
A
More in the alveolar air than in expired air
B
More in the expired air than in alveolar air
C
More in the inspired air than in expired air
D
More in the inspired air than in alveolar air
Correct Answer
Option A
Detailed Explanation
CO₂ content in the expired air is less than that of alveolar air because expired air from alveoli mixes with the dead space air containing a very low level of carbon dioxide.
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