GI Histo Flashcards Preview

Gastro > GI Histo > Flashcards

Flashcards in GI Histo Deck (75)
Loading flashcards...
1

space between lip, cheeks, and teeth

Vestibule

2

hard and soft palates, tongue, floor of mouth, and entrance to oropharynx

Oral cavity proper

3

What are the 3 types of mucosae in the oral cavity

Masticatory: SSE keratinized or parakaratinized
(mucosa on gingiva and hard palate)
Specialized: SSE keratinized
(dorsum of the tongue)
Lining: SSE non keratinized

4

What makes the specialized mucosa specialized?

Different/unique types of papillae

5

Strengthen mucosal stability of masticatory mucosa

Deep papillae from the underlying lamina propria

6

what is the distribution of papillae on the tongue?

-Ant 2/3 tongue = filiform with scattered fungiform
-Divides the ant 2/3 from the post 1/3—there are 8-12 circumvallate papillae in a row
-on lateral edges of tonge: foliates

7

Papillae on tongue that does not have taste buds

Filiform (fount on ant 2/3—the taste buds are found in the fungiform papillae in this area, they are scattered among the filiform)

8

Papillae on tongue that is keratinized

Filiform and some fungiform

9

What are the cells found in taste buds?

Sensory, supporting, and basal

10

Predominate cell type in a taste bud

Sensory

11

Cells in the taste bud that synapse with afferent nerve fibers

Sensory

12

What are the known tastes

Sweet, salt, bitter, umami

13

What is umami??

The taste of L-glutamate in monosodium glutamate (MSG) and asparagus

14

T or F: a sensory cells has a heterogenous mixture of sensory receptors

F: each sensory cell contains only 1 receptor type

15

T ort F: taste buds contain a heterogenous mixture of sensory cell types

T

16

What type of taste is generally limited to the back of the tongue

Bitter
**all others are distributed all over the tongue

17

Other than the tongue where are taste buds also found?

Roof of mouth
Posterior tongue
Epiglottis
Esophagus
pharynx

18

What are the major salivary gands?

Parotid, submandibular, and sublingual

19

Where are the minor salivary glands found?

CT of the cheek, tongue, and palate

20

What are the cell types in salivary gands?

Serous (pink) and mucous (blue)

21

What do the serious cells in salivary glands secrete?

Water substance with protein, amylase, and lysozyme

22

Describe the structural organization of the salivary glands

Acini of mucosal cells or serous cells covered in myoepithelical cells that when contracted will force secretions of acini into intercalated ducts and striated ducts

23

What is the difference between intercalated ducts and striated ducts?

Intercalated ducts are simple cuboidal and secrete and abs to modify secretion

Striated ducts are simple cuboidal to simple columnar and striations are caused by basal plasma membrane and aldso modify secretions
??? not too sure need to wiki

24

Aka for excretory ducts of salivary glands

Interlobular ducts
**do not modify secretions

25

Distinctions of the 3 salivary glands (types of acini)

Parotid is purely serous acini
Submandibular is mixed but mostly serous
Submandibular is mixed
Sublingual is mixed but mostly serous

26

What is a serous demilune and what gland(s) contain it?

In submandibular glands: serous cells forming a cap over the mucinous acini

27

Buffers content in oral cavity

Bicarb
**in saliva

28

Digestive enzymes present in saliva

Amylase and lipase

29

Role of saliva in health of teeth

Has protein that forms a protective film
Contains Ca and PO4 for minetalization of teeth

30

Are Abs preset in saliva

Yes