cell bio test 4 GI I Flashcards Preview

Cell Bio Test IV > cell bio test 4 GI I > Flashcards

Flashcards in cell bio test 4 GI I Deck (33):
1

where is the masticatory mucosa

gingivae and hard palate

2

What does the masticatory mucosa lack

submucosa on gums and palatine raphe

3

what is burton's line?

blue-gray gingival margin because of lead poisoning

4

what is lining mucosa?

nonkeratinized stratifies squamous--most of the oral cavity is this type

5

three layers of the lining mucosa?

stratum basale, spinosum and superficiale

6

What mucosa is associated with tase?

specialized mucosa

7

4 types of papillae

filiform, fungiform, circumvallate, foliate

8

filiform papillae

keratinized stratified squamous epithelium--no taste buds

9

fungiform papillae

mushroom shaped, abundant at tip of tongue

10

circumvallate papillae

8 to 12 large papillae in front of sulcus terminales, surrounded by lingual salivary glands (von Ebner's glands) that secrete into "moat" surrounding the papillae

11

foliate papillaea

lateral sides of tongue, stratified squamous, taste buds, small serous glands empty into clefts

12

3 types of taste bud cells

neuroepithelial (synapse with CN VII, IX and X), supporting cells (turnover in 10 days), basal cells (stem cells)

13

three regions of lip

skin, vermilion zone, mucosa

14

skin of lip

stratified squamous keratinized with hair and sweat glands

15

vermilion zone

thin skin that allows red of blood to show--no sweat or hair

16

mucosa of lip

stratified squamous nonkeratinized epithelium with lamina propria--submucosa deep to mucosa contains labial salivary glands

17

major salivary glands and their secretions

parotid (serous), submandibular gland (serous and mucous-mucous predominant), sublingual gland ( mixed with mucous predominant)

18

What is in saliva?

protein (protective pellicle on teeth), enzymes (amylase, lipase, lysozyme, lactoperoxidase), ions, mucins, IgA, Lactoferrin

19

crown of tooth composed of?

enamel, dentin

20

root of tooth composed of?

cementum, dentin

21

anatomic crown v. clinical crown?

clinical is what is exposed above the gumline

22

what makes up most of enamel?

calcium hydroxyapatite-hardest substance in body

23

where is enamel derived from/

epithelial tissue--not replaced once formed

24

what are the protein components of enamel?

enamelins and tuftelins

25

what can cause damage to enamel?

carious lesions, bulimia

26

stages of tooth development

bud, cap, bell, appositional dentin and enamel, tooth eruption, and functional tooth

27

bud stage

invagination of oral epithelium into mesenchyme, mesenchymal cells form primordium of dental papilla

28

cap stage

inner enamel epithelium--ameloblasts, neural crest cells of neuroectoderm differentiate into odontoblasts

29

bell stage

cells of stratum intermedium transport substances to ameloblasts

30

amelogenesis

enamel formation--matrix production by secretory ameloblasts (Tome's process is apical end of ameloblast). Matrix maturation is carried out by maturation-stage ameloblasts.

31

cementum

cementoblasts (from mesenchyme) secrete it. Cemetocytes and processes are found in lacunae and canaliculi along root. Cementum is avascular. Sharpey's fibers are periodontal ligament

32

Dentin

similar to bone but has dentin phosphoprotein and dentin sialoprotein. Secreted by odontoblasts (derived from neural crest cells of mesenchyme). Dentinal tubules are formed by odontoblasts embedded in dentin (exposure increases tooth sensitivity. Dentin is secreted throughout life

33

dental pulp and pulp cavity

has vessels and nerves. cavity becomes smaller as dentin is added inside tooth