epithelial cells Flashcards

1
Q

general epithelial characteristics

A

avascular
nutrients provided from connective tissue
polarised (difference between apical and basal end)

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2
Q

where is epithelium derived from

A

embroyo
ectoderm
endoderm
mesoderm

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3
Q

functions of epithelia

A

protection
absorption
secretion
filtration

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4
Q

classifications of epithelium - cell layers

A

simple

stratified

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5
Q

classifications of epithelium - shape

A

cuboidal
columnar
squamous

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6
Q

classifications of epithelium - cell modifictiosn

A

cilia
microvilli
kertinaised

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7
Q

classifications of epithelium - other cells present

A

goblet cells

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8
Q

epithelia in oral mucosa

A

stratified squamous epithelia

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9
Q

layers in stratified squamous epithelium

A

superficial
granular
spinous
basal

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10
Q

superficial layer

A

towards the outside

consists of dead keratin cells

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11
Q

granular

A

keratohyalin
membrane coating granules
provides water proofing

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12
Q

spinous

A

differentaiting cells

junctions keep cells packed together

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13
Q

basal

A

single alter
divides to replace dead cells from superficial layer
attatched to CT

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14
Q

why are some epithelium keratinised and some not

A

protection - high abrasion

non keratiesed- layer of dead cells with less keratin, needs to be flexible

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15
Q

which layer is the biggest layer in stratified squamous epithelium

A

spinous

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16
Q

linkage of stratified squamous epithelium

A

desmosomes

hemidesmosomes

17
Q

what separates CT and epitheliym

A

basement membrane

18
Q

what is the basement membrane

A

basal lamina +lamina reticularis

19
Q

gland types

A

exocrine

endocrine

20
Q

how are glands formed

A

proliferation of epithelial cells pushed into the underlying CT

21
Q

what are used to form secretory ducts in glands

A

simple cuboid

22
Q

what is found in alveoli membrane

A

simple squamous