3.1 lecture - classification of epithelia - Toth Flashcards Preview

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Flashcards in 3.1 lecture - classification of epithelia - Toth Deck (31)
1

in this cell shape there is not much cytoplasm, the nucleus occupies almost the whole cell, and it is rare to get a cross section without the nucleus

cuboidal

2

the epithelium lining the duct of an eccrine sweat gland is...

stratified cuboidal epithelium - 2 layers of cuboidal

3

the ectoderm gives rise to epithelia in these 3 places...

-skin
-oral cavity
-anus

4

the endoderm gives rise to epithelia in these 2 places

-gut tubes
-respiratory tubes

5

the mesoderm gives rise to epithelia in these 2 places

-endothelium of blood and lymph vessels
-mesothelium of peritoneum, pleura, pericardium

6

3 functions of epithelia

-protection
-secretion/absorption
-organization of surrounding tissue

7

disruption of the epithelia is termed ___

ulceration

8

ulceration refers to...

disruption of epithelia

9

this is the only place that stratified cuboidal epithelium is found

duct of eccrine sweat glands

10

stratified columnar epithelium is uncommon, except here ...

certain portions of the under eyelid

11

the duct of eccrine sweat glands is the only place this type of epithelium is observed

stratified cuboidal

12

this type of epithelium is uncommon except in certain portions of the under eyelid

stratified columnar

13

how can you tell apart the stratified columnar epithelium, say, of the eye, and the pseudostratified columnar epithelium, say, of the trachea

trachea - pseudostratified columnar mostly ciliated
eyelid - stratified columnar mostly goblet

14

this cell type is often found lining ducts

simple cuboidal

15

T/F there are many different subfamilies of keratin for a cell to choose from

true

16

what kind of specialized protein is found in the nails and hair

specialized keratin

17

T/F stem cells are located in all epithelial layers, usually in contact with the basement membrane

true

18

2 locations of stratified columnar epithelia include:

-trachea
-epididymis

19

where are stem cells located with respect to a hair follicle?

in the "bulge" region of the follicle

20

how do you tell keratinized from non-keratinized

-keratinize - no adluminal nuclei
-nonkeratinized - adluminal nuclei present

21

the vagina is lined with what kind of epithelium

simple squamous nonkeratinized

22

simple squamous keratinized epithelium is found primarily...

in the skin

23

the 2 parts of the cervix are:

-ectocervix
-external os

24

the ectocervix is lined with what kind of epithelium

simple squamous non-keratinized (same as vagina)

25

the external os is lined with what kind of epithelium

simple columnar with picae palmitae (folds)

26

"picae palmitae" =

"palm fronds," or the pattern of folding in the external os

27

this is an apparently stratified epithelium that reduces to a few layers when stretched

transitional epithelium (bladder)

28

transitional epithelium is also known as...

urinary epithelium - because it is only found in the urinary system

29

this epithelial type is one containing cell types of multiple shapes, though still one-layer thick in that all cells touch basement membrane

pseudostratified epithelium

30

the pseudostratified epithelium in the trachea can alternatively be called...

respiratory epithelia

31

how / where does metaplasia take place in the vagina

when columnar epithelium are exposed to the vaginal lumen (pH, bacteria, etc) the typically simple columnar epithelium of the cervix undergoes metaplasia into the SSNK of the vagina