The nose has mucus, a sticky substance .when outside air passes through the nose, the mucus , an inflammation of the bronchioles, is a condition in which the bronchioles are filled with mucus. when mucus 1a. blocks carbon dioxide from entering 1b. filters the air 1c. protects the respiratory system 2a. the air reaching the lungs will not be filtered 2b. less air reaches the lungs 2c. more air is exhaled

Mucus in nose helps us to filters the air which may contain dust particles and foreign particles.  Bronchitis is an inflammation of lining of bronchial tubes and due to inflammation mucus accumulates in bronchioles and thus less air reaches to the lungs.

1b. Filters the air 2b. Less air reaches the lungs

Explanation:

Answer 1:  Mucous is a sticky aqueous secretion produce inside the nose, trachea, bronchus and the entire respiratory tract. The sticky nature of the mucus causes the adhesion of dust, pollutant particles and air borne microbes entering the respiratory tract along with the air. This way the mucus helps in filtering the air.

Answer 2: Bronchitis is an inflammation of the bronchioles, the tubes which carries the oxygenated air into the lungs get blocked due to the accumulation of mucus. Therefore, less air reaches the lungs.  

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .