Lung Histology

Question 1

The alveolar septa are full of _________.

Answer 1

capillaries

Question 2

There are ________ between alveoli to allow equilibration of pressure.

Answer 2

pores

Question 3

What is black lung, pathologically?

Answer 3

Macrophages engulf carbon particles and die, getting stuck in the alveoli and septa.

Question 4

In terms of tissues, what does the alveolar lining comprise (from RBC to air)?

Answer 4

Plasma, endothelial cell, basal lamina, type I pneumocyte, and surfactant

Question 5

How thick is the alveolar lining?

Answer 5

0.2 - 0.3 microns

Question 6

What immune cells can infiltrate the airways?

Answer 6

Macrophages and neutrophils

Question 7

What kind of cartilage is in the trachea?

Answer 7

Hyaline

Question 8

Mucins are long strings of amino acids with _________ interspersed.

Answer 8

carbohydrates

Question 9

In general, how are bronchi different from bronchioles (histologically)?

Answer 9

Bronchi have cartilage

Question 10

Toward the bronchus (coming from the bronchioles), the epithelial layer is mostly ____________.

Answer 10

ciliated cells and goblet cells

Question 11

What do club/Clara cells look like?

Answer 11

They have protrusions into the airway

Question 12

Where are club/Clara cells found?

Answer 12

In the terminal bronchioles

Question 13

What do club/Clara cells secrete?

Answer 13

Surface-active material (not surfactant, though) that keeps the bronchioles open