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Histology final exam > Salivary Glands and Oral Tissues > Flashcards

Salivary Glands and Oral Tissues Flashcards

1
Q

what type of epithelium in oral mucosa

A

stratified squamous epithelium

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2
Q

what is the lamina propria of the oral mucosa like

A

dense CT

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3
Q

what is the submucosa of the oral mucosa like

A

loose CT

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4
Q

types of oral submucosa

A

lingual, masticatory and specialised

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5
Q

what submucosa is associated with taste buds

A

specialised mucosa

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6
Q

what is the name of the transition zone of the lips

A

vermillion border

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7
Q

epithelium of the vermillion border

A

thick stratified squamous epithelium

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8
Q

where is the hard palate formed

A

the anterior part of the roof of the mouth

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9
Q

where is the soft palate

A

the posterior part of the roof of the mouth

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10
Q

which palate is rugated

A

hard palate

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11
Q

epithelium of the hard palate is

A

keratinized/para-keratinized stratified squamous type

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12
Q

epithelium of the soft palate

A

non-keratinized squamous epithelium

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13
Q

epithelium of the nasopharynx

A

ciliated pseudostratified columnar epithelium

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14
Q

what cells are found in nasopharyngeal epithelium

A

goblet cells

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15
Q

what supports the soft palate core

A

palatine skeletal muscle

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16
Q

what glands sit near the oral surface

A

submucosal glands

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17
Q

what glands lie near the nasopharyngeal side

A

mixed seromucous glands

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18
Q

what papillae has no taste buds

A

filliform papillae

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19
Q

What is the mucosa of the tongue made up of?

A

Keratinized stratified squamous epithelium

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20
Q

Shape of fungiform papillae

A

Mushroom shaped

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21
Q

Where are fungiform papillae found?

A

Near the tip of the tongue

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22
Q

Shape of filiform papillae

A

Elongated cone shape

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23
Q

What papillae are keratinized

A

Filiform papillae

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24
Q

Shape of foliage papillae

A

Parallel ridges and furrows

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25
Q

Largest papillae

A

Circumvillate papillae

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26
Q

What empties into the furrows of circumvillate papillae

A

Ducts from Von ebner glands

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27
Q

What do taste buds do

A

Transduce chemical stimuli into nerve impulses

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28
Q

Structure of taste buds

A

Ovoid, 50 - 75 cells

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29
Q

What is present at the apical end of the taste bud

A

A taste pore

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30
Q

3 types of cell in a taste bud

A

Receptor cell, sustentacular cell, basal cell

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31
Q

Lifetime of receptor and sustentacular cells

A

10 - 14 days

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32
Q

Epithelium of posterior tongue

A

Smooth stratified squamous epithelium

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33
Q

Lymphoid tissue of posterior tongue

A

Lingual tonsil

34
Q

What composes waldeyer’s ring

A

Lingual tonsils, palatine tonsils and adenoids

35
Q

What are salivary glands

A

Exocrine glands of oral cavity

36
Q

How much saliva is secreted daily

A

700 - 1200 ml

36
Q

How much saliva is secreted daily

A

700 - 1200 ml

37
Q

What is saliva

A

Hypotonic

38
Q

Ph of saliva

A

Between 6.7 and 6.9

39
Q

Contents of saliva

A

Mucus, enzymes, antibodies and inorganic ions

39
Q

Contents of saliva

A

Mucus, enzymes, antibodies and inorganic ions

40
Q

Functions of saliva

A

Protection, buffering, tooth integrity, antimicrobial activity, digestion and taste

41
Q

Major salivary glands

A

Parotid, submandibular and sublingual

42
Q

Minor salivary glands

A

Palatine and lingual

43
Q

Structure of salivary glands

A

Compound tubuloacinar

44
Q

Parenchyma contents of salivary glands

A

Serous and mucous acini, duct system

45
Q

Stroma of salivary gland

A

Ct capsule with inward septa dividing the gland into lobes and lobules

46
Q

What travels in the ductal septae of salivary glands

A

Blood vessels, nerves and major ducts

47
Q

Classification of simple glands

A

Duct is unbranched

48
Q

Classification of compound glands

A

Gland has a branching duct system

49
Q

Classification of tubuloacinar glands

A

Gland has secretary tubules ending in acini

50
Q

What type of glands are salivary glands

A

Compound tubuloacinar glands

51
Q

Exocrine secretary mechanism

A

Merowine secretion

52
Q

What is merocrine secretion

A

Secretion by exocytosis

53
Q

Cells of serous acini

A

Wedge shaped with basal nucleus

54
Q

Cells of mucous acini

A

Cuboidal / columnar cells with compressed basal nucleus

55
Q

Serous demilune

A

Serous cells appear in a crescent shape at the end of the secretory unit

56
Q

Myoepithelial cells

A

Specialized cells found in the basal lamina of secretory units that contract to expel secretions from the acini

57
Q

Duct system of salivary glands

A

Secretory end pieces → intercalated ducts (simple cuboidal) → striated ducts (simple columnar) → interlobular ducts ( (pseudo) stratified cuboidal ; stratified columnar distally )

58
Q

Intercalated duct cell appearance

A

Cuboidal

59
Q

Striated duct appearance of cells

A

Columnar

60
Q

What do the striated ducts do

A

Pump Na+ ions out of the saliva against the gradient to produce hypotonic saliva

61
Q

Duct system of major salivary glands

A

Pseudostratified columnar / stratified cuboidal → stratified columnar → non-keratinized stratified squamous

62
Q

Secretions of parotid gland

A

Serous watery secretions with abundant amylase and proline rich proteins

63
Q

Secretions of submandibular gland

A

Secretions with abundant amylase and proline rich proteins and lysozyme and musigen

64
Q

Secretions of sublingual gland

A

Major secretary product is mucus but also secrete amylase and lysozyme

65
Q

Ratio of cells in parotid

A

All serous with equal excretory, striated and intercalated ducts

66
Q

Ratio of cells in submandibular

A

Mainly serous acini with more excretory and less intercalated ducts

67
Q

Ratio of cells in sublingual glands

A

Mainly mucus acini with mostly excretory and less striated ducts

68
Q

Where are lingual gland

A

Associated with the dorsal surface of the posterior tongue

69
Q

Where are minor sublingual glands found

A

Lower surface of tongue

70
Q

Where are labial glands found

A

Inner surface of the lips

71
Q

Where are the palatine glands

A

Submucosa of soft and hard palate

72
Q

Where are the buccal glands

A

Submucosa lining the cheeks

73
Q

What are Von Ebner’s glands

A

Serous glands

74
Q

Where do vessels and nerves enter and branch

A

Enter at the hilum and branch within the CT septa

75
Q

What surrounds the secretory and ductal components

A

A rich vascular and nerve plexus

76
Q

What stimulates secretion of saliva

A

Autonomic nervous system

77
Q

Parasympathetic stimulation

A

Acetylcholine

78
Q

Sympathetic stimulation

A

Noradrenaline

Histology final exam (7 decks)

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