QUESTION: Which of the following is not the function of conducting part of respiratory system?
A It humidifies the inhaled air
B Temperature of inhaled air is brought to body temperature
C Provides surface area for diffusion of O2 and CO2
D It clears inhaled air from foreign particles
ANSWER: Provides surface area for diffusion of O2 and CO2
| Aspect | Conducting Part | Respiratory Part |
| Components | · Nose and Nasal Cavity
· Pharynx · Larynx · Trachea · Bronchi · Bronchioles |
· Alveoli
· Respiratory Membranes |
| Function | · The most important function of conducting part of respiratory system is to humidify the inhaled air.
· Prevents excessive drying of the respiratory passage ways. · Adjusts the temperature of inhaled air and brings it closer to body temperature to prevent from thermal shock. · Clears inhaled air, thus make it free from foreign particles, such as dust and microbes.
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· Alveoli are tiny, air-filled sacs present in the lungs. These are the primary site, where oxygen is absorbed into the bloodstream and carbon dioxide is released from the bloodstream for exhalation.
· Respiratory membranes are the thin barrier between alveolar air and pulmonary capillaries that allows for the exchange of oxygen and carbon dioxide. |