5. Respiratory Histology

Question 1

What are the three regions of the nasal cavity?

Answer 1

Nasal Vestibule (just inside the nostrils - lined with skin)

Respiratory region (inferior 2/3 of the nasal cavities)

Olfactory region (upper 1/3)

Question 2

What differentiates olfactory mucosa from respiratory mucosa?

Answer 2

Thicker

Lack of goblet cells

Question 3

What is the function of sustentacular cells?

Answer 3

Mechanical and metabolic support to olfactory receptor cells.

Question 4

At what respiratory division do goblet cells stop being produced?

Answer 4

Broncioles (they do not have goblet cells)

Question 5

In what layer of the trachea do we find the trachealis muscle?

Answer 5

The adventitia

Question 6

What respiratory division do inhalers affect?

Answer 6

Bronchioles

Because of their prominent smooth muscle

Question 7

At what point in the respiratory division do we see clara cells and simple cuboidal epithelium?

Answer 7

Terminal Bronchioles

Question 8

What is the function of clara cells?

Answer 8

Preventing airway collapse during expiration

Question 9

What is an alveolar ring?

Answer 9

Aggregates of smooth muscle, collagen, and elastic fibers that form rings around alveolar ducts.