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Flashcards in Final Exam Deck (141)
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1

What type of surface epithelium is present in the vestibule of the nasal cavity?

Keratinized stratified squamous

2

What are vibrissae?

Hairs of the nasal vestibule acting as a large particle filter

3

What acts as the medium particle filter?

Mucociliary apparatus (goblet and ciliated columnar cells)

4

What causes a stuffy nose?

Inflam--> incr blood volume and incr in size of lamina propria-->decr lumen size

5

What causes a runny nose?

Inflam--> incr blood volume--> incr oxygen that stimulates seromucus gland secretion

6

What are the 4 paranasal sinuses?

Ethmoid, sphenoid, frontal, and maxillary sinuses

7

How do the paranasal sinuses connect to the nasal cavity?

Sinal ostia

8

What is the epithelium of the paranasal sinuses?

Respiratory

9

What exactly is respiratory epithelium?

Ciliated pseudostratified columnar epithelium

10

What may be the cause of a sinus infection?

Combination of small ostia and swelling in the lamina propria--> blocked ostia

11

T/F: All three subdivisions of the pharynx have stratified squamous as the surface epithelium.

False: Oropharynx and Laryngopharynx-stratified squamous
Nasopharynx-respiratory w/ mucociliary clearance

12

Where are the pharyngeal tonsils located?

Nasopharynx

13

What tonsils are present in the oropharynx?

Palatine and Lingual tonsils

14

Is there muscularis mucosa present in the pharynx?

No

15

What is the pharyngobasilar fascia?

The submucosa of the pharynx

16

What is special about the muscularis externa in the pharynx?

All skeletal muscle
Reversed pattern (inner long. and outer circular)

17

What is the term for the adventitia of the pharynx?

Buccopharyngeal fascia

18

What is the surface epithelium of the trachea?

Respiratory

19

What is the likely function of the brush cells?

Possibly chemosensory

20

What type of glands are present in the lamina propria of the trachea?

Seromucus glands

21

T/F: The muscularis mucosa is absent in the trachea.

True

22

The individual trachealis muscles represent the __ ___ of the trachea.

Muscularis externa

23

What 2 things allow for the airways to completely close in an asthma attack?

Lack of cartilage
Complete layer of smooth muscle

24

What glands are absent in the bronchioles?

Seromucus glands

25

What is the epithelium type of the bronchioles?

Ciliated columnar w/ some goblet and Clara cells

26

What are Clara cells?

secretory cells w/ short microvilli that produce enzymes and a surfactant-type material

27

What is the 1st region of respiratory portion of the respiratory system?

Respiratory bronchioles

28

What epithelial type is present in the respiratory bronchioles therefore making gas exchange possible?

Simple squamous epithelium

29

What is the dominant cell type in the alveoli?

Type 1 pneumocyte

30

What is the function of Type 1 pneumocytes?

Gas exchange