3.2 Lab - epithelia - hyperplasia & metaplasia Flashcards Preview

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Flashcards in 3.2 Lab - epithelia - hyperplasia & metaplasia Deck (27)
1

T/F a squamous cell is relatively inactive, metabolically

true

2

what gives a columnar epithelial cell its columnar shape?

stored product from secretions or absorptions

3

this epithelial cell type has significant metabolic activity but usually no predominant intracellular organelles other than the nucleus

cuboidal

4

the cell type in the secretory portion of an eccrine sweat gland

simple columnar

5

the cell type in the duct of an eccrine sweat gland

stratified cuboidal
(two layers of cuboidal)
(no secretion, just transport)

6

axillary skin refers to...

underarms
(lots of sweat glands)

7

where can eccrine sweat glands be found?

on most of skin

8

what are the epithelia types in an eccrine sweat gland?

simple columnar (secretory)
stratified cuboidal (duct)

9

what is the 3D shape of an eccrine sweat gland?

a coiled gland with a single duct extending to skin surface

10

where is stratified columnar epithelium found?

inner surface of eyelid
(secretes mucus in tears)

11

where are eccrine sweat glands usually found?

in skin everywhere, usually close to hair follicles

12

which are the most prominent glands in axillary (underarm) skin?

apocrine sweat glands (larger and deeper, secrete into hair follicle)
-eccrine sweat glands are smaller and more superficial, secrete to skin)

13

how do eccrine and apocrine sweat glands compare in size?

apocrine sweat glands have much larger lumens

14

define pseudostratified epithelium

all cells touch basement membrane, but not all touch lumen

15

how to tell pseudostratified epithelium from simple columnar?

nuclei will appear more stratified

16

are pesudostratified epithelia usually squamous, columnar, or cuboidal?

various types, will appear mostly columnar, bot only have to label it "pseudostratified epithelium," nothing more

17

where are psudostratified epithelia usually found?

conducting portions of respiratory system
(nasal cavity, trachea, bronchi)
often with ciliated and mucosal cells

18

if you have an epithelia that may be simple columnar, stratified columnar, or pseudostratified, how can you tell which?

if in respiratory system - pseudostratified
if inner eyelid - stratified columnar
other secretory locations - prob simple columnar

19

an apparently stratified epithelium with a number of layers that changes with stretching is called a...

transitional epithelium

20

where is transitional epithelium found?

exclusively in urinary system
-spaces exposed to urine (ureter, bladder)

21

what are umbrella cells specialized for?

confining urine

22

what kind or epithelia have umbrella cells?

transitional

23

T/F umbrella cells function in absorption & secretion

false
no apparent absorptive or secretory functions
confine urine

24

T/F umbrella cells are often multinucleated

true

25

where will you find a metaplastic change from simple columnar to stratified squamous non-keratinized epithelium?

cervix
vaginal end = stratified squamous NK
proximal end = secretory

26

metaplasia

transformation from one epithelial type into another

27

hyperplasia

abnormal proliferation of cells