Which of the following is not the function of the conducting part of the respiratory system?
Answer: (D) Provides surface for diffusion of O2 and CO2. Answer: (d) Provides surface for diffusion of O2 and CO2 Solution: The conducting part transports air to the alveoli, clears it of foreign particles, humidifies it and brings it to body temperature.
- A.It clears inhaled air from foreign particles
- B.Inhaled air is humidified
- C.Temperature of inhaled air is brought to body temperature
- D.Provides surface for diffusion of O2 and CO2✓
Correct Answer
(D) Provides surface for diffusion of O2 and CO2
Solution & Explanation
Answer: (d) Provides surface for diffusion of O2 and CO2 Solution: The conducting part transports air to the alveoli, clears it of foreign particles, humidifies it and brings it to body temperature. The actual diffusion of O2 and CO2 occurs in the respiratory (exchange) part — the alveoli — not the conducting part, so option (d) is not a function of the conducting part. NCERT: Ch 14, p.185, line 7 — "clears it from foreign particles, humidifies and also brings the air to body temperature"