Question

The function of hair and mucous lining in the nasal chamber is to ______________.

• A. filters, prevent entry of dust and germs and warms the air
• B. prevent entry of foreign bodies and germs
• C. warm up the air entering the lungs
• D. filter inhaled air

Answer 1

The correct option is A

filters, prevent entry of dust and germs and warms the air

Nasal chamber is lined with cilia (hair) and also mucus. Inhaled air is a mixture of dust particles and germs. Cilia and mucus play a vital role in the purification of the air.

• The dust particles are filtered by cilia lining in nostrils.
• Cilia and mucus lining of the nostrils also prevent the entry of foreign bodies and germs. Mucus entraps the the dust and also the germs and other foreign bodies (pathogens) because of its sticky nature.
• It also warms up the air entering into the lungs.