Epithelium Flashcards

1
Q

Origin of eptihelial cells (which germ layer)

A

ectoderm

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2
Q

Name the 4 types of tissues in body

A

Epithelial, connective, muscle, nervous

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3
Q

2 types of epithelium

A
  1. membranous epithelium

2. glandular epithelium – secrete substances

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4
Q

5 characteristics of epithelial tissues

A
  1. Cellularity
  2. Polarity
  3. Attachment – basement membrane
  4. Avascularity
  5. Regeneration
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5
Q

4 Functions of epithelial tissue

A
  1. Protection
  2. Permeability
  3. Sensation
  4. Secretion
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6
Q

2 Classifications of epithelium based on layer

A
  1. Simple

2. Stratified

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7
Q

Classifications of epithelium based on shape

A
  1. Squamous
  2. Cuboidal
  3. Columnar
  4. Pseudostratified
  5. Transitional
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8
Q

What type of epithelium is oral mucosa lined by?

A

stratified squamous epithelium

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9
Q

Which type of epithelium can be referred to as keratinised/ non-keratinised?

A

Stratified squamous epithelium

e.g. oral mucosa

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10
Q

2 constituent layers of oral mucosa?

A
Epithelium
Lamina propria (loose connective tissue)
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11
Q

Layer underneath oral mucosa? What type of connective tissue is it?

A

submucosa – dense irregular connective tissue

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12
Q

Structure & Function of a stratified epithelium

A

multiple layers of cells –> more difficult to penetrate –> able to withstand strong forces

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13
Q

Structure & Function of loose connective tissue

A

cells are surrounded by a matrix –> flexible –> allow more movement

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14
Q

3 Categories of oral mucous membrane (oral mucosa) and exmamples

A
  1. Specialized (e.g. dorsum of tongue)
  2. Masticatory (e.g. gingiva & hard palate)
  3. Lining (all other areas)
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15
Q

4 layers of cells in orthokeratinized epithelium

A
  1. stratum corneum
  2. stratum granulosum
  3. stratum spinosum
  4. stratum basale
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16
Q

Significance of interdigitations

A

Account for mobility of tissue

17
Q

Degree of keratinisation of lining mucosa? In particular, alveolar mucosa?

A

non-keratinized / parakeratinized

alveolar mucosa: non-keratinized

18
Q

Degree of keratinisation of masticatory mucosa? In particular, palatal mucosa?

A

Parakeratinized/ orthokeratinized

palatal mucosa: orthokeratinized

19
Q

Degree of keratinisation of specialized mucosa?

A

very thick parakeratinized/ orthokeratinized on dorsum surface of tongue

20
Q

Name of gland beneath circumvallate papillae

A

Serous glands of von Ebner

21
Q

4 types of papillae on tongue

A
  1. Circumvallate papillae
  2. Fungiform papillae
  3. Filiform papillae
  4. Foliate papillae
22
Q

Which type of papillae on tongue doesn’t have a taste bud?What does it have instead?

A

Filiform papillae

They have tactile sensation