Histo 2

Question 1

Types of Epithelium in the Nasal Cavity

Answer 1

Stratified squamous, olfactory, respiratory

Question 2

Types of Epithelium in the Paranasal Sinus

Answer 2

Stratified squamous, respiratory

Question 3

Types of Epithelium in the Nasopharynx

Answer 3

Stratified squamous, respiratory

Question 4

Types of Epithelium in the Larynx

Answer 4

Stratified squamous, respiratory

Question 5

Types of Epithelium in the Trachea

Answer 5

Respiratory

Question 6

Types of Epithelium in the Bronchus

Answer 6

Respiratory

Question 7

Types of Epithelium in the Bronchioles

Answer 7

Ciliated

Question 8

Types of Epithelium in the Terminal Bronchioles

Answer 8

Bronchiolar

Question 9

Explain the progressive transition of the respiratory tract.

Answer 9

Question 10

What type of cartilage is in the trachea?

Answer 10

hyline cartilage

Question 11

Tubuloacinar glands in the trachea

Answer 11

secretes proteolytic and mucolytic enzymes, number diminishes as you go down the trachea

Question 12

Do rabbits have any tubuloacinar glands in their trachea?

Answer 12

no

Question 13

Layers of Tubular Organs with a muscularis muscosa

Answer 13

1. Epithelium (of the lumen)
2. Lamina Propria
3. Muscularis Mucosa
4. Submucosa
5. Muscularis Externa
6. Adventitia OR Serosa

Question 14

Layers of Tubular Organs without a muscularis mucosa

Answer 14

1. Epithelium
2. Propria submucosa
3. Muscularis Externa
4. Adventitia OR Serosa

Question 15

Histologically, how do you see if a tubular organ has a muscularis mucosa?

Answer 15

look for layer of smooth muscle near the lumen

Question 16

Can you differentiate the bronchus and trachea histologically?

Answer 16

not well, will generally find more sooth muscle around the bronchus, bronchus has smaller diameter

Question 17

How do you tell histologically when you’ve gone from bronchus to bronchioles?

Answer 17

there is no hyaline cartilage in the bronchioles

Question 18

Does the trachea have a muscularis mucosa?

Answer 18

no

Question 19

Does the bronchus have a muscularis mucosa?

Answer 19

yes

Question 20

BALT

Answer 20

bronchus asssociated lymphatiic tissue

Question 21

Bronchiolar epithelium

Answer 21

columnar –> cuboidal, includes ciliated cells

Question 22

Club cells

Answer 22

bronchiolar exocrine cells which replace goblet cells deeper in the respiratory tract

Question 23

At what part of the respiratory tract do we get to the respiratory system (site of gas exhange)?

Answer 23

respiratory bronchioles

Question 24

What species don’t have respiratory bronchioles?

Answer 24

humans and small rodents (they go straight from bronchiole to alveolar ducts)

Question 25

Alveolus

Answer 25

“tufts” of epithelium and smooth muscle lining the respiratory bronchioles (mostcommonly seen in cats)

Question 26

How can we tell when we are in an alveolar duct?

Answer 26

no more smooth muscle

Question 27

Alveolar Sac

Answer 27

cluster of alveoli

Question 28

Final Site for Gas Exchange?

Answer 28

Alveolus

Question 29

Alveolus

Answer 29

in alveolar sac; made up of type 1 pneumocytes and type 2 septal cells, has macrophages in lumen and capillaries in walls

Question 30

Type I Pneumocyte

Answer 30

long, thin squamous cells for gas exchange

Question 31

Type II Septal Cell

Answer 31

cuboidal, producs surfactant