Respiratory Anatomy and Histology

Question 1

Define the air conduction system of the respiratory tract (5)

Answer 1

nasal
paranasal
trachea
bronchi
functions to carry air, modify air, and for olfaction

Question 2

Define the transitional system of the respiratory tract (2)

Answer 2

bronchioles

transition between conduction system and gas exchange system

Question 3

Define the air exchange system of the respiratory tract (4)

Answer 3

alveolar ducts
alveolar sacs
alveoli
functions as blood-air barrier

Question 4

What portions of the respiratory tract are lined by ciliated respiratory epithelium? (7)

Answer 4

nasal cavity
paranasal sinuses
nasopharynx
larynx
trachea
bronchi
primary bronchioles

Question 5

What roles does ciliated respiratory epithelium play in mucosal defense?

Answer 5

particulate removal

particulate capture and mounting defense

Question 6

Where are mucous cells located? (5)

Answer 6

nasal cavity
nasopharynx
larynx
trachea
bronchi

Question 7

List several ways in which the avian respiratory system differs from the mammalian respiratory system (4)

Answer 7

• choanal slit in upper palate
• soft-walled infraorbital sinus
• dorsal and ventral bronchi to parabronchi to air capilaries (greater countercurrent exchange)
• avascular sacs that do not exchange oxygen

Question 8

What is the most predominant antibody in the air conduction system (airway) and how does the antibody function?

Answer 8

IgA, binds inhaled particles?