Same chapter2 marksDifficulty: Easy
Name the organs of the human respiratory system in the order in which air passes through them.
The Respiratory System
2 marksDifficulty: Easy
State two differences between inspired air and expired air.
Original Khojo Papers practice question — not from a past board paper.
Answer
Inspired air contains about 21% oxygen and only about 0.04% carbon dioxide, whereas expired air contains about 16% oxygen and about 4% carbon dioxide. Expired air is also warmer and saturated with water vapour.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The difference arises from gaseous exchange in the alveoli.
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Medium
Distinguish between breathing and respiration.
The Respiratory System
Same chapter3 marksDifficulty: Medium
How is an alveolus adapted for gaseous exchange?
The Respiratory System
Same chapter3 marksDifficulty: Medium
Describe the mechanism of inspiration.
The Respiratory System
Same chapter3 marksDifficulty: Medium
State three differences between inspired and expired air.
The Respiratory System
Same chapter3 marksDifficulty: Medium
Why is the trachea supported by rings of cartilage, and why are the rings incomplete at the back?
The Respiratory System