Functional histology

Question 1

What is the conducting portion of the respiratory tract?

Answer 1

Nasal cavity to bronchioles

Question 2

What is the respiratory portion of the respiratory tract?

Answer 2

respiratory bronchioles to alevoli

Question 3

At what structure does the extrapulmonary section end?

Answer 3

Primary bronchi

Question 4

What types of epithelium are in the conducting portion of the respiratory tract?

Answer 4

Pseudostratified ciliated epithelium, except terminal bronchioles which is simple columnar with cilia

Question 5

What types of epithelium are in the respiratory portion of the respiratory tract?

Answer 5

simple cuboidal with sparse cilia, except alveoli which is simple squamous

Question 6

What is the term for mucous being moved by cilia into the pharynx to be swallowed?

Answer 6

Mucociliary escalator

Question 7

Name 3 secretions from the epithelium and submucosal glands of the trachea and bronchi

Answer 7

Serum proteins, lysozyme, antiproteases

Question 8

What is the purpose of clara cells?

Answer 8

They secrete a lipoprotein which prevents the walls sticking together during expiration

Question 9

Briefly describe emphysema

Answer 9

destruction of alveolar walls and permanent enlargement of air spaced, air becomes trapped in the alveoli

Question 10

Briefly describe pneumonia

Answer 10

Inflammation of the lung caused by bacteria, causes consolidation as the alveoli fill with inflammatory cells

Question 11

Name 2 organisms that can cause pneumonia

Answer 11

Strep.pneumoniae, Staph.aureus