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Histology > GI Oral Cavity > Flashcards

GI Oral Cavity Flashcards

1
Q

alimentary canal

A

tube food passes through

mouth, eso, stomach, SI, LI

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2
Q

mucosa fxn

A

barrier to separate lumen from rest of body

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3
Q

mucosa components

A

epithelia
lamina propria
muscularis mucosae

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4
Q

submucosa fxn

A

bind mucosa to muscularis externa

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5
Q

submucosa tissue type

A

CT (usually dense irregular)

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6
Q

muscularis externa fxn

A

propel the contents of the digestive tract

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7
Q

adventitia

A

CT that is continuous w/ adjacent CT

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8
Q

serosa

A

mesothelim supported by this CT to suspend tube

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9
Q

gingivitis Sx

A

gums may be soft, puffy, dark red, receding or bleed easily

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10
Q

gingivitis cause

A

plaque on teeth for 2 - 3 days

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11
Q

gingivitis Tx

A

removal of plaque/ tartar by scaling, good oral hygiene

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12
Q

taste bud cell types

A

neuroepithelial cells
supporting cells
basal cells

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13
Q

neuroepithelial cells

A

elongated cells w/ microvilli

connected by tight jxns

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14
Q

neuroepithelial location

A

facial, glossopharyngeal, vagus nerves

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15
Q

supporting cells (taste buds)

A

do not synapse w/ nerve cells

elongate w/ microvilli

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16
Q

basal cells (taste buds)

A

stem cells for neuroepithelial and supporting cells

usually located at basal lamina of taste bud

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17
Q

taste bud locations

A

tongue
glossopalatine arch
soft palate

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18
Q

bitter taste path

A
  1. bind to receptors
  2. activate G-protein
  3. secondary messenger - up Ca2+
  4. Ca causes NT release
  5. impulse sent along post-synaptic nerve
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19
Q

sweet taste path

A
  1. bind to receptors
  2. activate G-protein
  3. secondary messenger - up Ca2+
  4. Ca causes NT release
  5. impulse sent along post-synaptic nerve
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20
Q

umami taste path

A
  1. bind to receptors
  2. activate G-protein
  3. secondary messenger - up Ca
  4. Ca causes NT release
  5. impulse sent along post-synaptic nerve
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21
Q

sour taste path

A
  1. H+ protons act directly on ion channels
  2. activates and increases Ca
  3. generates AP
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22
Q

salty taste path

A
  1. Na acts directly on ion channels
  2. activates and increases Ca
  3. generates AP
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23
Q

enamel structure

A

96 - 98 Ca hydroxyapatite

crystals are arranged as rods

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24
Q

enamel and fluoride

A

fluoride makes enamel more resistant to acid demineralization

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25
Q

making enamel

A

ameloblasts secrete enamel

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26
Q

making dentin

A

odontoblasts secrete predentin which becomes mature mineralized dentin

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27
Q

stages of tooth development

A
  1. bud stage
  2. cap stage
  3. bell stage
  4. . appositional dentin + enamel stage
  5. tooth eruption stage
  6. functional tooth stage
28
Q

cementum

A

bone-like material
covers root of tooth
sharpey’s fibers bind cementum to bony matrix of socket
attaches tooth to maxilla or mandible

29
Q

peridontal ligament

A

attach roots of teeth to bone

collagen fibers and some elastic fibers

30
Q

making cementum

A

cementocytes

31
Q

major glands (list)

A

parotid
submandibular
sublingual

32
Q

minor glands

A

lingual
labial
buccal
molar

33
Q

minor gland location

A

submucosa

34
Q

major gland structure

A

paired
long ducts
dense CT capsule

35
Q

compound acinar gland - interlobar duct epi

A

stratified

36
Q

compound acinar gland - striated duct epi

A

simple cuboidal or columnar

37
Q

compound acinar gland - intercalated duct epi

A

simple cuboidal

38
Q

serous gland acini

A

pyramidal shaped cell

contains lots of rER, golgi, secretory vesicles + zymogen granules

39
Q

serous acini secrete

A

protein

40
Q

mucous acini secrete

A

mucin

41
Q

mucous acini

A

tubular cells
synth + release mucuous
may seem empty @ apical, flattened nuc at bottom (basal)

42
Q

gland secretion types

A

parotid: mucous
subman: mostly serous
subling: mostly mucous

43
Q

myoepithelial cell fxn

A

get secretory products to the excretory duct

44
Q

myoepithelial cells

A

located btwn basal plasma membrane of epi cells and basal lamina of epi of underlying
proximal portion of duct system

45
Q

protid gland structure

A

striated ducts, adipose tissue
CT divides into lobules
lumen not clearly visible
looks like pancreas but no centroacinar cells + more ducts

46
Q

sublingual gland structure

A

mostly mucous
lumen can be IDed
serous demilunes

47
Q

submandibular gland structure

A

mostly serous acini
extensive ducts w/ pale cytoplasm
large lumen
CT subdivide lobe into lobules

48
Q

salivary duct types

A

intercalated
striated
excretory

49
Q

intercalated salivary ducts

A

lined by cuboidal cells

lead away from acinus

50
Q

striated salivary ducts

A

lined by both simple cuboidal cells and columnar cells
infoldings of basal plasma membrane (look like striations)
lots of mitochondria

51
Q

excretory salivary ducts

A

connect to oral cavity

cuboidal and stratified columnar cells

52
Q

main excretory duct

A

stensen’s duct

wharton’s duct

53
Q

salivary gland tumor malignancies

A

75% parotid are benign
50% subman malignant
80% minor are malignant

54
Q

salivary gland tumor Sx

A

benign present w/ painless swelling of gland, numbness

55
Q

salivary gland Dx

A 
PE
x-ray
CT
MRI
biopsy
56
Q

salivary gland Tx

A

surgical removal

if malignant + radiation or chemo

57
Q

lip epi

A

stratifified keratinized outside

strat squamous nonker (vestibule)

58
Q

lip mucosa/submucosa

A

vermillion zone
dermal papillae
minor mixed salivary glands
hair follicles (outside)

59
Q

oral cavity epi

A

strat squamous nonkeratinized

60
Q

gums epi

A

strat squamous partially-keratinized

hemidesmosomes in junctional epi next to teeth

61
Q

filiform structure

A

strat squamous - ker/para

NO taste buds

62
Q

fungiform structure

A

strat squamous epi
taste buds @ top
mushroom shaped

63
Q

circumvallate structure

A

strat squamous epi
taste bud on dome side in grooves
serous glands
dome shaped w/ grooves

64
Q

foliate structure

A

strat squamous epi
tastebuds on sides
Von Ebner’s glands
parallel low ridges (longitudinal furrows)

65
Q

place in mouth w/o MM

A

tongue

Histology (10 decks)

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