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Foundations 1 > Week 3 Epithelial Type Modules > Flashcards

Week 3 Epithelial Type Modules Flashcards

1
Q

what are the four basic tissues in the body?

A

nervous, muscular, connective, epithelial

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2
Q

where is epithelial tissue found (2)?

A

covers exterior body surfaces and lines cavities and tubes (anywhere the body comes into contact with the external environment)

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3
Q

what is cytokeratin?

A

intermediate filament that all epithelium contain. This helps histologists stain epithelium

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4
Q

what are four potential functions of epithelial cells?

A

protection, transportation, glandular secretions, sensation

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5
Q

what are the three domains of an epithelial cells?

A

apical domain (faces lumen), basal domain (sits atop basement membrane), lateral domain (between adjacent epithelial cells)

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6
Q

what two features are used to classify epithelial cells?

A

number of cell layers, morphology of the cells ON THE SURFACE OF THE EPITHELIUM

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7
Q

when determining cell shape, where do you look?

A

cells on the surface of the epithelium

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8
Q

epithelial cells that are one cell thick are classified as…

A

simple

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9
Q

epithelial cells that are two or more cells layers thick are classified as…

A

stratified

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10
Q

epithelial cells that are wider than they are tall are classified as…

A

squamous

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11
Q

epithelial cells that are equally wide and tall are classified as…

A

cuboidal

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12
Q

epithelial cells that are taller than they are wide are classsified as…

A

columnar

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13
Q

what is the function of simple squamous epithelium? where is it seen (4)

A

fxn: selectively permeable barrier that allows for rapid diffusion Location: respiratory spaces (alveoli), bowman’s capsule, endothelium (lines blood vessels), mesothelium (body cavities)

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14
Q

all epithelium rest on what?

A

a basement membrane

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15
Q

what is the function (3) and location (3) of simple cuboidal epithelium

A

fxn: protection, absorption, secretion location: small ducts of exocrine glands (pancreas), kidney tubules, thyroid follicles

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16
Q

simple columnar epithelium: function (2), location (3)

A

Fxn: absorption and secretion Location: stomach, small intestine (and colon), gallbladder (lines most the GI tract)

17
Q

pseudostratified epithelium: function (3), location (2)

A

fxn: absorption, secretion, transport location: bronchial tree (ciliated), vas deferens/epididymis

18
Q

is preudostratified epithelium really stratified at all?

A

no, all cells rest on BM, their nuclei are just not all on the same level (as seen in simple columnar)

19
Q

stratified squamous epithelium: fxn, location (4)

A

fxn: protection location: epidermis of skin, oral cavity, esophagus, vagina

20
Q

where is keratinized epithelium found? what type of epithelium is it?

A

stratified squamous epithelium can be keratinized or non-keratinized. keratinized epithelium is on the skin

21
Q

what is keratin? role?

A

extra layer of keratin on top of the epithelium that adds protection

22
Q

stratified cuboidal epithelium: function (2), location (2)

A

fxn: protection and conduit Location: large ducts of exocrine glands (salivary, mammary, sweat), anorectal jxn

23
Q

stratified columnar epithelium: fxn (2)? lxn (2)?

A

Rare in body. functions in protection and conduit. location is large exocrine glands and anorectal jxn

24
Q

transitional epithelium: appearance, location, fxn, alternate name

A

appearance: large dome-shaped “umbrella-like” cell on surface Fxn: distensible, protection location: lower urinary tract AKA urothelium

25
Q
A

simple squamous epithelium

26
Q
A

simple cuboidal

27
Q
A

simple columnar: note nuclei are on the same level

28
Q
A

pseudostratified. note nucleus on different levels

29
Q
A

stratified squamous: only the top layer counts!!

30
Q
A

stratified cuboidal

31
Q
A

stratified columnar

32
Q
A

transitional epithelium (urothelium)

33
Q
A

Foundations 1 (65 decks)

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