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Anatomy Week 10 BT > Oral Cavity (Lect) > Flashcards

Oral Cavity (Lect) Flashcards

1
Q

What are the two parts of the oral cavity and what do they consist of?

A
  1. Vestibule: space between the lip, cheeks, and teeth

2. Oral Cavity Proper: hard and soft palates, tongue, floor of mouth, and entrance to oropharynx

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2
Q

What are the 3 major paired salivary gland?

A
  • parotid
  • submandibular
  • sublingual

Note: these have ducts that open into the oral cavity

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3
Q

T or F: the oral mucosa contains a layer of muscularis mucosa?

A

FALSE

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4
Q

What layers make up the mucosa in the oral cavity?

A
  • epithelial layer

- lamina propria

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5
Q

What are the 3 types of mucosae that make up the epithelium in the oral cavity?

A
  1. Masticatory
  2. Specialized
  3. Lining mucosa
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6
Q

Where is MASTICATORY mucosa located and what type of cells make up its epithelium?

A
  • Gingiva and hard palate
  • Deep papillae
  • Stratified Squamous keritinized or parakeratinized epithelium
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7
Q

Where is SPECIALIZED mucosa located and what type of cells make up its epithelium?

A
  • Dorsum of the tongue
  • Abundant PAPILLAE
  • Stratified Sqaumous Keritinized epithelium
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8
Q

Where is LINING mucosa located and what type of cells make up its epithelium?

A
  • everything that’s not masticatory or specialized

- Stratified Squamous nonkeratinized epithelium

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9
Q

Compare the papillae of the lining epithelium to that of the masticatory mucosa.

A

Lining epithelium have sparse short papillae
-help adapt to underlying muscle

Masticatory epithelium has deep papillae from underlying lamina propria that acts STRENGTHEN mucosal stability

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10
Q

What four types of papillae are located in the Specialized Mucosa?

A
  1. Filiform Papillae
  2. Fungiform Papillae
  3. Circumvallate Papillae
  4. Foliate Papillae
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11
Q

Which of the 4 types of papillae in the Specialized mucosa lacks taste buds?

A

Filiform = NO taste buds

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12
Q

Where are filiform papillae located and what is their arrangment?

A
  • Over the entire anterior 2/3 of dorsal tongue
  • organized into rows

Note: Highly keritinized

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13
Q

Describe the morphology of Fungiform papillae, their location, and arrangement.

A
  • Mushroom shape (HAVE TASTE BUDS)
  • Scatter among filiform on anterior 2/3

Note: these are not well developed in humans

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14
Q

Describe the morphology of Circumvallate papillae, their location, and arrangement.

A
  • CASTLE AND MOAT SHAPE arrangment: each papilla is surrounded by a depression = “moat”
  • 8-12 in a row divide the anterior 2/3 of the tongue and posterior 1/3 of the tonge
  • HAVE TASTE BUDS - located on the LATERAL surface opening into the moat
  • Have minor salivary glands
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15
Q

Describe the morphology of Foliate papillae, their location, and arrangement.

A
  • Parallel low ridges on the lateral edge

- HAVE TASTE BUDS

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16
Q

What kinds of cells are located in taste buds?

A

3 Types

  1. Sensory Cells
  2. Supporting Cells
  3. Basal Cells
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17
Q

Describe the morphology and unique features of sensory cells in the taste bud.

A
  • Elongated and Predominate

- Synapse with afferent nerve fiber

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18
Q

What is the job of supporting cells in the taste bud and what do they look like?

A
  • Elongated like Glial Cell
19
Q

What are basal cells in the taste bud?

A
  • Short stem cells for the other two types
20
Q

T or F: each taste bud only contains a single type of sensory cell.

21
Q

T or F: each sensory cell an can only have one type of sensory receptor

22
Q

Where are taste buds for bitter things located?

A

Back of the tongue

23
Q

T or F: taste buds can be located in places other than the tongue

A

True (some found on roof of mouth, posterior tongue, epiglottis, esophagus, and pharynx)

24
Q

Describe the tissue layers in the tongue.

A
  • Lots of STRIATED muscle covered by mucosa
25
What are the major salivary glands? Are these endocrine or exocrine?
- PAROTID - SUBMANDIBULAR - SUBLINGUAL - Exocrine glands Note: these produce 90% of saliva
26
What two principle cell types make up mucous glands?
1. Serous Cells | 2. Mucous Cells
27
What is secreted by serous cells?
- Secrete a watery substance containing: 1. Protein 2. Amylase 3. Lysozyme
28
What is secreted by mucous cells? Describe cellular features.
- secret mucus Features: - Empty looking apical region (where mucus has been lost in preparation) - Nucleus is typically flattened and at the base of the cell
29
What is the general structure of Salivary Glands?
- Clusters of cells organized into acini (alveoli) creating a VERY small central lumen - Bulbs of Acini cells (serous or mucous cells) are surrounded on inside and outside. - Outside = MYOEPITHELIAL cells - Inside= INERCALATED DUCTs (orginate from acini) and striated ducts
30
What are some distinguishing features of serous cells?
- Pyrmidal shape - Tight and Adherent junctions at apex - Secretory granuals at apex - Round nuclei - well striated RER - Basal basophilia
31
What features help to differentiate a mucous cell from a serous cell?
Mucous cells: - More columnar in shape - more compressed basal nucleus ** BOTH cell types have apical granuals
32
T or F: salivary glands are organized as lobules.
True
33
What size differences exist between intercalated ducts and striated ducts?
- intercalated ducts are small while striated ducts are larger (around the size of an acinus or even bigger) **Note: both ducts have the ability to modify secretions while interlobular ducts do not
34
What are interlobular ducts?
- Excretory Ducts found in CT between lobes
35
Differentiate between the 3 types of salivary gland.
- Parotid - purely serous acini - Submandibular Gland - mixed, but mostly serous - Sublingual Gland - mixed, but mostly mucous
36
What is a serous demilune?
- in mixed glands the mucous cells push the serous cells to the periphery forming a cap of serous cells
37
What cell type synthesizes the anti body IgA (salivary immunoglobulin A) and where are these located?
- Synthesized by plasma cells in the CT surrounding secretory acini
38
Explain the process of salivary cells taking up IgA for later secretion.
- Plasma cells in CT make IgA - IgA is released into to CT - Acini cells make a GLYCOPROTEIN receptor for IgA - glycoprotein + IgA = secretory IgA complex which is internalized
39
T or F: saliva is a mixture from all glands
True
40
What is the epithelium ling of the mucosa in the oral cavity?
Stratified squamous nonkeratinized epithelium
41
T or F: you would likely see serous demilunes in the parotid gland.
False, the parotid only does serous secretions so all cells will be serous not just the exterior. You would be more likely to see this in the Sublingual or Submandibular glands.
42
Which type of papillae on the tongue does not have taste buds?
- filiform papillae
43
What type of duct orginates from a salivary acinus?
Intercalated duct

Anatomy Week 10 BT (6 decks)

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