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Organ histology > Epithelium > Flashcards

Epithelium Flashcards

0
Q

How do epithelium cells obtain nutrition considering they are avascular

A

by diffusion

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1
Q

True or false; epithelium is avascular

A

true

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2
Q

What are the 2 parts of basement membranes?

A

Basal lamina

Reticular lamina

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3
Q

Partial basement membranes are composed of what singular cell type?

A

Basal lamina only (no reticular cells)

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4
Q

Providing a surface for epitheial cell attachment
molecular filter
And limit stretch are all functions of what?

A

Basement membrane

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5
Q

What is the zonula occludens?

A

Tight junctions

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6
Q

True or false; zonula occludens (tight junctions) functions as strong attachment and prevents the passage of materials between cells

A

true

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7
Q

What kind of epithelium lines gallbladder?

A

simple columnar

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8
Q

What kind of epithelium line the jejunum

A

simple columnar

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9
Q

What kind of epithelium makes up skin

A

keratinized stratified squamous

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10
Q

What kind of epithelium lines ureters

A

transitional/urinary

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11
Q

What kind of epithelium makes up thyroid follicles

A

simple cuboidal

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12
Q

What kind of epithelium makes up parietal layer of bowman’s capsule (kidney)

A

simple squamous

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13
Q

What kind of epithelium makes up esophagus

A

stratified squamous

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14
Q

What kind of epithelium makes up conjunctiva of the eye

A

stratified columnar

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15
Q

What kind of epithelium makes up the urinary bladder

A

transitional/urinary

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16
Q

What kind of epithelium makes up the trachea

A

ciliated pseudostratified columnar

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17
Q

What kind of epithelium makes up typical exocrine ducts

A

simple cuboidal

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18
Q

What kind of epithelium makes up the tongue

A

stratified squamous

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19
Q

What kind of epithelium makes up the stomach

A

simple columnar

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20
Q

What kind of epithelium makes up the renal calyces

A

transitional/urinary

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21
Q

What kind of epithelium makes up the bronchi

A

ciliated pseudostratified columnar

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22
Q

What kind of epithelium makes up the oral cavity

A

stratified squamous

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23
Q

Method of secretion found in: all children’s sweat glands

A

merocrine/eccrine

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24
Q

Method of secretion found in: adult sweat glands in pubic and axilla

A

apocrine

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25
Q

Method of secretion found in: pancreatic acini (pancreas)

A

merocrine/eccrine

26
Q

Method of secretion found in: sebaceous glands in skin

27
Q

Method of secretion found in: goblet cells

A

merocrine/eccrine

28
Q

Method of secretion found in: ceruminous glands in ear

29
Q

Method of secretion found in: salivary glands

A

merocrine/eccrine

30
Q

Method of secretion found in: lactating mammary glands

31
Q

Which type of cell junction is composed of cadherins and marginal bands

A

zonula adherens

32
Q

True or false; zonular adherens has two functions - strong attachment and provide cell structural stability

33
Q

What is zonula adherens synonymous with?

A

adhesion belt

34
Q

What is another name for macular adherens and what is its function

A

dermosomes - strong attachment

35
Q

True or false; gap junctions are composed of 6 connexins arranged in a cylinder and provide strong attachment and transport of materials

36
Q

What 3 things make up a junctional complex

A

Zonula occludens
Zonula adherens
Macula adherens

37
Q

A single layer of flattened cells that acts as a living filter best describes what kind of epithelium

A

simple squamous

38
Q

Cube shaped cell with nucleus occupying much of cytoplasm that functions in secretion and absorption best describes which type of epithelium

A

simple cuboidal

39
Q

Cell with height that typically looks rectangular when cross sectioned and functions in secretion and absorption best describes which kind of epithelium

A

simple columnar

40
Q

Ciliated pseudostratified columnar epithelium is also known as what?

A

respiratory epithelium

41
Q

Where would you expect to find ciliated pseudostratified columnar epithelium

A

(respiratory epithelium) so trachea, respiratory region nasal cavity and bronchi

42
Q

What do goblet cells produce

43
Q

what do ciliated columnar cells do

A

move mucus

44
Q

What do basal cells do?

A

function as stem cells for both ciliated columnar cells and goblet cells in respiratory epithelium

45
Q

Microvilli are fingerlike projections found in kidney tubule cells and small intestine - What are their function

A

increase surface area for absorption

46
Q

What are sterocilia

A

extremely long microvilli

47
Q

What are cilia?

A

thin apical hair-like extensions of the cytoskeleton

48
Q

What are two points about cilia that are important to remember

A

many mitochrondria

NO secretion or absorption

49
Q

What is epithelium that is two or more cell layers thick?

A

stratified

50
Q

What is the function of stratified squamous cells? What about its limitations

A

proctect from abrasion

limitation - no protection from drying `

51
Q

True or false; skin is an example of keratinized stratified squamous cells

52
Q

true or false; melanocytes protect against UV radiation

53
Q

What are langerhans cells

A

immune function - recognize foreign antigens

54
Q

True or false; langerhans cells (immune function) increase in number with repeated UV exposure

A

false; decrease in number

55
Q

Where would you find stratified cuboidal cells? Function?

A

Larger ducts in sweat glands and salivary glands

increase protection and provide barrier

56
Q

What is significant about the urinary tracts thin, fenestrated basement membrane?

A

Allows stretching - prevents waste/urine from seeping between epithelial cells

57
Q

What is vitiligo?

A

patches of skin which lack melanocytes

58
Q

True or false; moles are due to proliferation of melanocytes

59
Q

What is the cause of albinism

A

melanocytes fail to produce melanin

60
Q

What is the most common method of secretion?

A

merocrine (eccrine)

61
Q

True or false; merocrine (eccrine) glands are associated with odor

62
Q

Which secretory cell dies after maturity spilling its contents

63
Q

What do serous glands produce? What about mixed glands

A

proteins

Serous and mucus

Organ histology (10 decks)

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