Module 7: Respiratory system

Question 1

Two functional components of the respiratory system

Answer 1

Conducting system (responsible for supplying and cleaning the air)
Respiratory portion (where exchange of gases occurs)

Question 2

Another name for “respiratory epithelium”

Answer 2

Simple columnar ciliated epithelium

Question 3

Conducting portion of the respiratory system

Answer 3

Nasal cavities, nasopharynx, larynx ,trachea, bronchi and bronchioles

Question 4

Respiratory portion of the respiratory system

Answer 4

Portion of the respiratory system where gaseous exchange occurs
Consists of respiratory bronchioles, alveolar ducts, alveolar sacs and alveoli

Question 5

Histological difference between bronchi and bronchioles

Answer 5

Bronchi are typically greater than 1mm in diameter, bronchioles are smaller. Bronchi have a large amount of elastin in the lamina propria and have cartilage plates/islands around them. Bronchioles have a continuous layer of smooth muscle around them.

Question 6

Type I alveolar cells

Answer 6

Simple squamous epithelium

Provide the site for gas exchange between the capillaries and the alveoli

Question 7

Type II alveolar cells

Answer 7

Produce surfactant, a compound that prevents the alveoli from collapsing

Question 8

Main tissue components of the alveolar wall

Answer 8

Surface epithelium, blood vessels, connective tissue