cell bio test 4 GI I BS

Question 1

where is the masticatory mucosa

Answer 1

gingivae and hard palate

Question 2

What does the masticatory mucosa lack

Answer 2

submucosa on gums and palatine raphe

Question 3

what is burton’s line?

Answer 3

blue-gray gingival margin because of lead poisoning

Question 4

what is lining mucosa?

Answer 4

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

Question 5

three layers of the lining mucosa?

Answer 5

stratum basale, spinosum and superficiale

Question 6

What mucosa is associated with tase?

Answer 6

specialized mucosa

Question 7

4 types of papillae

Answer 7

filiform, fungiform, circumvallate, foliate

Question 8

filiform papillae

Answer 8

keratinized stratified squamous epithelium–no taste buds

Question 9

fungiform papillae

Answer 9

mushroom shaped, abundant at tip of tongue

Question 10

circumvallate papillae

Answer 10

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

Question 11

foliate papillaea

Answer 11

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

Question 12

3 types of taste bud cells

Answer 12

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

Question 13

three regions of lip

Answer 13

skin, vermilion zone, mucosa

Question 14

skin of lip

Answer 14

stratified squamous keratinized with hair and sweat glands

Question 15

vermilion zone

Answer 15

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

Question 16

mucosa of lip

Answer 16

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

Question 17

major salivary glands and their secretions

Answer 17

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

Question 18

What is in saliva?

Answer 18

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

Question 19

crown of tooth composed of?

Answer 19

enamel, dentin

Question 20

root of tooth composed of?

Answer 20

cementum, dentin

Question 21

anatomic crown v. clinical crown?

Answer 21

clinical is what is exposed above the gumline

Question 22

what makes up most of enamel?

Answer 22

calcium hydroxyapatite-hardest substance in body

Question 23

where is enamel derived from/

Answer 23

epithelial tissue–not replaced once formed

Question 24

what are the protein components of enamel?

Answer 24

enamelins and tuftelins

Question 25

what can cause damage to enamel?

Answer 25

carious lesions, bulimia

Question 26

stages of tooth development

Answer 26

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

Question 27

bud stage

Answer 27

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

Question 28

cap stage

Answer 28

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

Question 29

bell stage

Answer 29

cells of stratum intermedium transport substances to ameloblasts

Question 30

amelogenesis

Answer 30

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

Question 31

cementum

Answer 31

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

Question 32

Dentin

Answer 32

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

Question 33

dental pulp and pulp cavity

Answer 33

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