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GIT113 Histology > Histology Of The Tongue, Salivary Glands, And Esophagus > Flashcards

Histology Of The Tongue, Salivary Glands, And Esophagus Flashcards

1
Q

Functions of the tongue

A

Mixing food
Taste
Speech

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2
Q

Tongue

A

Richly vascularized and inner gated mass of muscles enclosed in a mucosal layer of stratified squamous epithelium

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3
Q

Lingual tonsils

A

Root of tongue

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4
Q

Lingual papillae

A

Mucosal projections on the dorsal surface

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5
Q

Type of muscle in tongue

A

Visceral striated muscle

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6
Q

4 types of lingual papillae

A

Filiform
Fungiform
Circumvallate
Foliate

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7
Q

Filliform papillae

A

Smallest, most numerous
Keratinized tip
Lack taste buds

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8
Q

Fungiform papillae

A

Mushroom shaped red nodules
Contain taste buds on dorsal surface
On the margin of the tongue

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9
Q

Circumvallate papillae

A

In front of sulcus terminalis
Dome shaped
Have Ember’s glands that drain into invaginations ‘
numerous taste buds

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10
Q

Foliate papillae

A

Not abundant in human
Contain taste buds

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11
Q

Taste buds

A

Oval pale bodies that extend into thick epithelium

Present on Fungiform, Circumvallate, foliate papilla

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12
Q

3 cellular structures of states buds

A

Neuroepithelial cells
Supporting cells
Basal cells

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13
Q

Undersurface of the tongue is covered by

A

Stratified squamous epithelium nonkeratinized

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14
Q

Major salivary glands surrounded by a capsule

A

Parotid
Submandibular
Sublingual

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15
Q

Which nervous system produces saliva

A

Autonomic nervous system

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16
Q

Saliva is antibacterial because it has three things

A

• Lysozyme, which attacks the walls of bacteria
• Lactoferrin, which chelates iron necessary for bacterial growth
• S IgA which neutralizes bacteria and viruses

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17
Q

Digestive function of saliva

A

Amylase and lingual lipase

18
Q

3 features of salivary glands

A

Secretory units
Acini
Excretory ducts

19
Q

The secretory portions of the salivary gland are composed of

A

-serous acini
-mucous acini
-mixed serosa-mucinous acini
Myoepithelial cells

20
Q

What do serous acini cells secrete

A

Protein

21
Q

Function of mucous acini

A

Synthesize and store mucus in mucinogen granules

22
Q

Function of myoepithelial cells

A

They contract to secrete products

23
Q

Intercalated ducts

A

Secretory acini empty into these ducts
Secrete HCO3- and absorb Cl-

24
Q

Striated ducts

A

Reabsorption of Na+ and secretion of K+ and HCO3-

25
Q

3 excretory ducts

A

Interlobular
Interlobar duct
,main duct

26
Q

Parotid gland cells

A

Serous cells

27
Q

Parotid gland secrete

A

Secrete abundant a-amylase that initiates hydrolysis of carbohydrates and proline-rich proteins with antimicrobial and other protective properties

28
Q

Submandibular gland cells

A

Serous mixed with mucous acini

29
Q

Submandilbular glands secrete

A

Alpha amylase, proline-rich proteins, lysozyme

30
Q

Sublingual gland cells

A

Mixed serous and mucus cells BUT MAINLY MUCUS CELLS

31
Q

Main product of sublingual glands

A

Mucus

32
Q

Mucosa

A

lining epithelium
• underlying CT (lamina propria)
• smooth muscle (muscularis mucosae)

33
Q

Submucosa

A

Dense irregular CT

34
Q

Muscularis

A

Inner circular and outer longitudinal muscle layers

35
Q

Adventitia

A

CT where the wall of the tube is directly attached to adjoining structures

36
Q

Serosa

A

Membrane of mesothelium,and a small amount of underlying CT

37
Q

Functions of esophagus

A

Peristalsis to move food down

38
Q

Mucosa of esophagus

A

Nonkeratinized stratified squamous epithelium
Diffuse lymphatic tissue

39
Q

Submucosa of esophagus

A

Dense irregular connective tissue
Has lymphatic tissue and lymphatic nodules
Meissner’s plexus

40
Q

Muscularis externa in esophagus

A

Auerbach’s plexus

41
Q

Muscularis

A

Striated part is innervated by somatic motor neurons
Smooth muscle is innervated by visceral motor neurons

42
Q

Adventitia

A

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GIT113 Histology (5 decks)

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