n the bronchioles:   a. resistance to air flow increases due to their small diameter   b. resistance to air flow is not significant due to the increased number of these tubes providing a huge total cross-sectional area   c. resistance to air flow is not significant due to their large diameter   d. none of the above is correct

11. During pneumonia, the fluid that enlarges the alveolar walls a. Causes permanent damage to the cells (b. Makes it harder to breath in С. Makes it easier to breath in d. Increases the distance air must diffuse across e. Does not affect diffusion but does affect cellular respiration

5. What is the function of the conchae in the nasal cavity? a. increase surface area b. exchange gases c. maintain surface tension d. maintain air pressure 6. The faucess connects which of the following structures to the oroph a. nasopharynx b. laryngopharynx c. nasal cavity d. oral cavity 7. Which of the following are structural features of the trachea? a. C-shaped cartilage wto allenco aon b. smooth muscle fibers C. cilia d. all of the above 8. Which of the following structures is not part of the bronchial tree? a. alveoli b. ronchi C. terminal bronchioles d. respiratory bronchioles 9. What is the role of alveolar macrophages? a. to secrete pulmonary surfactant b. to secrete antimicrobial proteins C. to remove pathogens and debris d. to facilitate gas exchange