Author Question: What type of alveolar cells cover over 90 of the surface area of the alveolar-capillary mem-brane? ... (Read 109 times)

cagreen833 · **on:** Jul 16, 2018

What type of alveolar cells cover over 90 of the surface area of the alveolar-capillary mem-brane?

a. Alveolar macrophages
b. Granular pneumocytes
c. Type I cells
d. Type II cells

Question 2

What is called the functional unit of the lungs?

a. Only the alveoli
b. Acinus
c. Alveolar-capillary membranes
d. Terminal bronchioles

perkiness · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: C
The alveolar septa are covered with extremely flat squamous epithelia called type I pneumocytes (Figure 9-54). While they represent only about 8 of all the cells found in the alveolar region, the type I cells cover approximately 93 of the alveolar surface.

Answer to Question 2

ANS: B
The primary lobule or acinus forms the functional unit of the lungs.