3.2 Lab - epithelia - hyperplasia & metaplasia

Question 1

T/F a squamous cell is relatively inactive, metabolically

Answer 1

true

Question 2

what gives a columnar epithelial cell its columnar shape?

Answer 2

stored product from secretions or absorptions

Question 3

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

Answer 3

cuboidal

Question 4

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

Answer 4

simple columnar

Question 5

the cell type in the duct of an eccrine sweat gland

Answer 5

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

Question 6

axillary skin refers to…

Answer 6

underarms

lots of sweat glands

Question 7

where can eccrine sweat glands be found?

Answer 7

on most of skin

Question 8

what are the epithelia types in an eccrine sweat gland?

Answer 8

simple columnar (secretory)
stratified cuboidal (duct)

Question 9

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

Answer 9

a coiled gland with a single duct extending to skin surface

Question 10

where is stratified columnar epithelium found?

Answer 10

inner surface of eyelid

secretes mucus in tears

Question 11

where are eccrine sweat glands usually found?

Answer 11

in skin everywhere, usually close to hair follicles

Question 12

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

Answer 12

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

Question 13

how do eccrine and apocrine sweat glands compare in size?

Answer 13

apocrine sweat glands have much larger lumens

Question 14

define pseudostratified epithelium

Answer 14

all cells touch basement membrane, but not all touch lumen

Question 15

how to tell pseudostratified epithelium from simple columnar?

Answer 15

nuclei will appear more stratified

Question 16

are pesudostratified epithelia usually squamous, columnar, or cuboidal?

Answer 16

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

Question 17

where are psudostratified epithelia usually found?

Answer 17

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

Question 18

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

Answer 18

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

Question 19

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

Answer 19

transitional epithelium

Question 20

where is transitional epithelium found?

Answer 20

exclusively in urinary system

-spaces exposed to urine (ureter, bladder)

Question 21

what are umbrella cells specialized for?

Answer 21

confining urine

Question 22

what kind or epithelia have umbrella cells?

Answer 22

transitional

Question 23

T/F umbrella cells function in absorption & secretion

Answer 23

false
no apparent absorptive or secretory functions
confine urine

Question 24

T/F umbrella cells are often multinucleated

Answer 24

true

Question 25

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

Answer 25

cervix
vaginal end = stratified squamous NK
proximal end = secretory

Question 26

metaplasia

Answer 26

transformation from one epithelial type into another

Question 27

hyperplasia

Answer 27

abnormal proliferation of cells