Question

question 5 (5 points) which structure or substance is responsible for helping filter and clean air as it passes through the trachea and bronchioles? a) alveoli b) saliva c) cilia d) nasal passages question 6 (5 points) gas exchange of co₂ for oxygen occurs between capillaries and what structure in the lungs? a) alveoli b) veins c) cilia d) bronchioles

Explanation:

Cilia are tiny hair - like structures in the trachea and bronchioles that move in coordinated waves to help filter and clean the air by trapping and moving mucus and foreign particles. Alveoli are the sites of gas exchange in the lungs, where carbon dioxide and oxygen are exchanged between capillaries and the alveoli. Saliva is related to the mouth and digestion, not air - filtering in the trachea and bronchioles. Nasal passages also filter air but the question specifically asks about the trachea and bronchioles.

Answer:

Question 5: C) Cilia
Question 6: A) Alveoli