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DENT 1020 > saliva > Flashcards

saliva Flashcards

1
Q

Duct of Parotid Gland

A

Stenson’s Duct

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2
Q

Duct of Submandibular Gland

A

Wharton’s Duct

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3
Q

Major duct of Sublingual Gland

A

Bartholin’s Duct

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4
Q

Minor ducts of Sublingual Gland

A

Ducts of Rivinus (along sublingual fold)

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5
Q

Opening of Parotid Gland

A

Parotid Papilla

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6
Q

Opening of Submandibular Gland

A

Sublingual caruncle

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7
Q

Type of saliva secreted by parotid gland

A

Secretory end pieces are ALL serous

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8
Q

Type of saliva secreted by submandibular gland

A

Mixed gland, contains serous end pieces & mucous tubules capped with serous demilunes
Serous cells outnumber mucous cells

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9
Q

Type of saliva secreted by sublingual gland

A

Mixed, predominantly mucous cells at end piece

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10
Q

Hierarchy of duct system

A

intercalated duct –> striated duct (intra-lobular & inter-lobular) –> excretory duct

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11
Q

what kind of cells are salivary glands derived from?

A 
epithelial cells
(arise from a cord of epithelium growing into underlying connective tissue)
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12
Q

Cell surrounding secretory acini

A

Myoepithelial cells

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13
Q

where are minor salivary glands found?

A

submucosa

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14
Q

Give 2 places where minor salivary glands are not found?

A

Gingiva

Anterior hard palate

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15
Q

Are minor salivary gland predominantly mucous/ serous?

A

Mucous

except lingual serous glands that open into circumvallate papillae & foliate papillae

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16
Q

What is the name of secretory end pieces?

A

Acini

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17
Q

What is salivary gland surrounded by?

A

Connective tissue capsule

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18
Q

What does the connective tissue divide the glands into? And what are the boundaries called?

A

Lobes –> lobules (smaller)

Boundaries: septum

19
Q

Lining of intercalated ducts?

A

Simple cuboidal epithelium

20
Q

Lining of striated ducts?

A

Simple Columnar epithelium

21
Q

Where are excretory ducts located in?

A

in connective tissue septa between lobules

extralobular & interlobular excretory ducts

22
Q

What is the shape of excretory duct cells?

A

Typically pseudostratified epithelium with columnar cells

23
Q

What is the space in the middle of a secretory end piece called?

A

Lumen

24
Q

What are the finger-like extensions between cells from the lumen? What are they for?

A

Intercellular canaliculi – increase area of luminal surface of cells

25
Q

Are serous cells present in mucous end pieces?

A

Yes, serous demilunes cover the mucous cells at the end of tubule.
Their secretions reach lumen via intercellular canaliculi between mucous cells.

26
Q

Functions of myoepithelial cells

A

Contract like a muscle – squeezes acini and aids secretion of saliva accumulated in hollow centre of acinus.

27
Q

shape of serous end piece

A

spherical

28
Q

shape of mucous end piece

A

tubular configuration

29
Q

In which type of duct is capillary plexus present in the surrounding tissue?

A

Striated duct

30
Q

Which duct is enclosed by basal lamina?

A

striated duct, excretory duct

31
Q

2 main functions of saliva

A

Protection & Lubrication

32
Q

Is serous saliva mainly responsible for protection/lubrication?

A 
protective function 
(many important constituents dissolved)
33
Q

Is mucous saliva mainly responsible for protection/lubrication?

A

Lubrication

34
Q

Resting pH of oral cavity

A

6.7-7.4

35
Q

critical pH of enamel

A

5.5

36
Q

critical pH of dentine`

A

6.5

37
Q

Main Function of proteins present in saliva

A

stabilize constituent ions of apatite –> don’t precipitate out –> maintain supersaturation of saliva with calcium & phsophate ions

38
Q

Name of graph recording pH level in oral cavity

A

Stephan Curve

39
Q

Important function of saliva pellicle

A

Act as diffusion barrier to slow H+ diffusion towards tooth and Ca2+ diffusion away from tooth

40
Q

Where is resting saliva arose from?

A

60% submandibular glands
20% parotid glands
15% minor gland
5% sublingual glands

41
Q

7 Chemical factors influencing erosive potential of acid

A
  1. pH & buffering capacity of product
  2. Type of acid (pKa value)
  3. Adhesion of product to dental surface
  4. Chelating properties of product
  5. Calcium concentration
  6. Phosphate concentration
  7. Fluoride concentration
42
Q

Result of substituting phosphate ion with carbonate ion in HA crystal

A

become more soluble -> not ideal

43
Q

Result of substituting calcium ion with magnesium ion in HA crystal

A

More inert & insoluble

44
Q

Result of substituting hydroxide ion with fluoride ion in HA crystal

A

More stable

DENT 1020 (7 decks)

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