lecture 10 Flashcards

(22 cards)

1
Q

endothelium is avascular except

A

the chochlear duct that possess stria vasularis

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2
Q

what are 3 ways to classify epithelia

A

1) via layers- simple has one layer at the basement membrane
stratified has multilayers
2)cell shape in the superficial layer on stratified epithelia (sqamous, cuboidal, columnar)
3) keratinized/not

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3
Q

squamous vs columnar vs cuboidal

A

squamous is flat
columnar is column shaped
cuboidal is cubed

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4
Q

transitional epithelia

A

balloon shaped outer layer and relaxed or contracted (like in a urinary bladder that’s not full)

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5
Q

pseudostratified epithelia

A

one layer but have multiple sizes and shapes of cells but all attached to basement lamina

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6
Q

where is simple squamous found?

A

in the aveoli of lungs and in blood vessels

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7
Q

what is simple squamous epithelium function?

A

blood-brain barrier, filtration and exchange

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8
Q

where are simple cuboidal epithelia found?

what are their main functions?

A

thyroid particles, renal tubules and ducts of glands

absorption, excretion, barrier, conduit

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9
Q

where are simple columnar epithelia found and what are their main functions

A

found in uterine tubes, stomach and intestines

for absorption, secretion and barrier

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10
Q

pseudostratified epithelia are found where? function?

A

trachea, bronchi and ducts of male reproductive system

secretion, absorption, barrier and transport

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11
Q

squamous keratinized vs nonkeratinized

A

keratinized in skin

nonkeratinized in vagina, esophogous and distal anal canal

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12
Q

squamous cell carcinoma

A

change nonkeratinized tissue to keratinized

= keratin pearls

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13
Q

where are transitional squamous epithelia loacted? function?

A

they are found in urinary bladder, urethra, ureter

they are for distention, protection and barrier

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14
Q

cilium

A
have 9-2 array at top
9-3 at bottome 
made of microtubules
with multiple dyenin-ATPase proteins
used in motility
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15
Q

primary cilium

A

missing the two central microtubules
non-motile
key role in tissue morphogenesis
play role in chemosensors, osomoreceptors, and mechanorectors

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16
Q

polycystic kidney disease

A

mutation in polycystin 1 or 2 that causes the mitotic spindle in renal cells to form incorrectly causing a horizontal growth of the tubule and the diameter is going to get greater and greater until you have cysts

17
Q

what do the celia in the primitive node do?

A

they direct flow thru the primitive flow correctly to provide the left right axis

18
Q

microvilla made of

A

microfilaments

19
Q

where do the microvilla terminate and what’s down there

A

terminal web,
actin, myosin and myosin 2 which has atp activity that bring the microvillae closer or further away that allows you to absorb or not absorb as much based on surface area

20
Q

brush border

A

mature microvillae

pas positive

21
Q

stereocelia

A
more like stereovilli
non motile
elongated microvilli
actin
found in male reproductive ducts and inner ear
22
Q

car tangier ciliopathy

A

chronic sinitus- inflammation of mucosa
bronchiectasis- dilation of bronchi
situs inversus- abdominal stuff on wrong sides