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Flashcards in lecture 10 Deck (22):
1

endothelium is avascular except

the chochlear duct that possess stria vasularis

2

what are 3 ways to classify epithelia

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

3

squamous vs columnar vs cuboidal

squamous is flat
columnar is column shaped
cuboidal is cubed

4

transitional epithelia

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

5

pseudostratified epithelia

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

6

where is simple squamous found?

in the aveoli of lungs and in blood vessels

7

what is simple squamous epithelium function?

blood-brain barrier, filtration and exchange

8

where are simple cuboidal epithelia found?
what are their main functions?

thyroid particles, renal tubules and ducts of glands
absorption, excretion, barrier, conduit

9

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

found in uterine tubes, stomach and intestines
for absorption, secretion and barrier

10

pseudostratified epithelia are found where? function?

trachea, bronchi and ducts of male reproductive system
secretion, absorption, barrier and transport

11

squamous keratinized vs nonkeratinized

keratinized in skin
nonkeratinized in vagina, esophogous and distal anal canal

12

squamous cell carcinoma

change nonkeratinized tissue to keratinized
= keratin pearls

13

where are transitional squamous epithelia loacted? function?

they are found in urinary bladder, urethra, ureter
they are for distention, protection and barrier

14

cilium

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

15

primary cilium

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

16

polycystic kidney disease

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

what do the celia in the primitive node do?

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

18

microvilla made of

microfilaments

19

where do the microvilla terminate and what's down there

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

brush border

mature microvillae
pas positive

21

stereocelia

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

22

car tangier ciliopathy

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