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Organ histology > Epithelium > Flashcards

Epithelium Flashcards

(64 cards)

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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
Method of secretion found in: adult sweat glands in pubic and axilla
apocrine
25
Method of secretion found in: pancreatic acini (pancreas)
merocrine/eccrine
26
Method of secretion found in: sebaceous glands in skin
holocrine
27
Method of secretion found in: goblet cells
merocrine/eccrine
28
Method of secretion found in: ceruminous glands in ear
apocrine
29
Method of secretion found in: salivary glands
merocrine/eccrine
30
Method of secretion found in: lactating mammary glands
apocrine
31
Which type of cell junction is composed of cadherins and marginal bands
zonula adherens
32
True or false; zonular adherens has two functions - strong attachment and provide cell structural stability
true
33
What is zonula adherens synonymous with?
adhesion belt
34
What is another name for macular adherens and what is its function
dermosomes - strong attachment
35
True or false; gap junctions are composed of 6 connexins arranged in a cylinder and provide strong attachment and transport of materials
true
36
What 3 things make up a junctional complex
Zonula occludens Zonula adherens Macula adherens
37
A single layer of flattened cells that acts as a living filter best describes what kind of epithelium
simple squamous
38
Cube shaped cell with nucleus occupying much of cytoplasm that functions in secretion and absorption best describes which type of epithelium
simple cuboidal
39
Cell with height that typically looks rectangular when cross sectioned and functions in secretion and absorption best describes which kind of epithelium
simple columnar
40
Ciliated pseudostratified columnar epithelium is also known as what?
respiratory epithelium
41
Where would you expect to find ciliated pseudostratified columnar epithelium
(respiratory epithelium) so trachea, respiratory region nasal cavity and bronchi
42
What do goblet cells produce
mucus
43
what do ciliated columnar cells do
move mucus
44
What do basal cells do?
function as stem cells for both ciliated columnar cells and goblet cells in respiratory epithelium
45
Microvilli are fingerlike projections found in kidney tubule cells and small intestine - What are their function
increase surface area for absorption
46
What are sterocilia
extremely long microvilli
47
What are cilia?
thin apical hair-like extensions of the cytoskeleton
48
What are two points about cilia that are important to remember
many mitochrondria NO secretion or absorption
49
What is epithelium that is two or more cell layers thick?
stratified
50
What is the function of stratified squamous cells? What about its limitations
proctect from abrasion limitation - no protection from drying `
51
True or false; skin is an example of keratinized stratified squamous cells
true
52
true or false; melanocytes protect against UV radiation
true
53
What are langerhans cells
immune function - recognize foreign antigens
54
True or false; langerhans cells (immune function) increase in number with repeated UV exposure
false; decrease in number
55
Where would you find stratified cuboidal cells? Function?
Larger ducts in sweat glands and salivary glands increase protection and provide barrier
56
What is significant about the urinary tracts thin, fenestrated basement membrane?
Allows stretching - prevents waste/urine from seeping between epithelial cells
57
What is vitiligo?
patches of skin which lack melanocytes
58
True or false; moles are due to proliferation of melanocytes
true
59
What is the cause of albinism
melanocytes fail to produce melanin
60
What is the most common method of secretion?
merocrine (eccrine)
61
True or false; merocrine (eccrine) glands are associated with odor
false
62
Which secretory cell dies after maturity spilling its contents
holocrine
63
What do serous glands produce? What about mixed glands
proteins Serous and mucus

Organ histology (10 decks)

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