Epithelial Tissue (Exam 1)

Question 1

What s the most cellular tissue in the body

Answer 1

Epithelial tissue

Question 2

how are epithelial tissues named

Answer 2

according to arrangement of cells (aka layers (simple, stratified)
according to type ( squamous, cuboidal, columnar, 
Special types (pseudo stratified and transitional (urothelium))

Question 3

what is epithelioid tissues

Answer 3

Resemble epithelial tissue but lack free surface

- often used to describe tumors

Question 4

all epithelial cells display what

Answer 4

typically display Free surfaces, polarity, do not contain blood vessels, uniform geometric shape when viewed form the side, cells are tightly bound together, relatively little intercellular matrix

Question 5

Apical domains

Answer 5

Surfaces of the cells that are in contact with a lumen

Question 6

Basolateral domains

Answer 6

surfaces of cells that are locked together by special junctional complexes with neighboring cells as well as the surface opposite the apical domain that is in contact with the basil lamina

Question 7

Epithelial tissues may be derived from what embryonic layer (s)

Answer 7

Ectoderm (the skin epidermis and glands)
Endoderm (the lining of the GI tract (including glands)
Mesoderm (The lining of blood vessels, mesothelium, and bowman’s capsule

Question 8

Epithelial tissues sit on top of what

Answer 8

The basement membrane

Question 9

The basement membrane consists of what two components

Answer 9

Basal lamina and Reticular lamina

Question 10

How thick is the basal lamina

Answer 10

50-80 nm thick

Question 11

what is the basal lamina composed of

Answer 11

Type IV collagen puls glycoproteins

is PAS+ .

Question 12

where is the basal lamina absent

Answer 12

Lymph vessels and hepatic sinusoids

Question 13

What is the reticular lamina in contact with

Answer 13

The bottom part of the basement membrane and is in contact with the underlying CT

Question 14

what is the reticular lamina composed of

Answer 14

argyrophilic fibers, reticular fibers and glycoproteins

Question 15

what are the functions of the basement membrane

Answer 15

Selective filtration barrier
scaffold for embryogenesis and regeneration
stabilization of tissue shapes

Question 16

can epithelial tissues be innervated

Answer 16

yes

Question 17

Do epithelial tissues form secretory and excretory parts of glands

Answer 17

yes

Question 18

Do epithelial tissues line body cavities and cover body surfaces

Answer 18

Yes

Question 19

Lightly Keratinized epithelium may be found where

Answer 19

esophagus and vagina

Question 20

Heavily keratinized epithelium may be found where

Answer 20

epidermis

Question 21

Is psuedostratified a type of simple or stratified type of epithelium

Answer 21

Simple

Question 22

The pseudo stratified arrangement may be explain by what

Answer 22

some epithelia may reflect the role of stem cells (the sorter cells in the layer) that are necessary to balance cell turnover by replacing more mature cells when they become aged or damaged

Question 23

Transitional epithelium is thought to be simple or stratified

Answer 23

simple but with the appearance of having more than one layer because of the positions of the nuclei

Question 24

The apical domains are characterized by surface modifications such as

Answer 24

Cilia or microvilli

Question 25

the apical domains face what

Answer 25

The lumen or external environment

Question 26

The basolateral domains are characterized by what

Answer 26

intercellular junctions

Question 27

where is simple squamous epithelium found

Answer 27

Lines lumina of ducts, vessels, and other tubular structures

forms walls of alveoli, bowman’s capsules and inner surfaces of membranous labyrinth and tympanic membrane

Question 28

Where is simple cuboidal epithelium found

Answer 28

surface of ovary, pigmented epithelium of retina, kidney tubules, glands and ducts, terminal bronchioles, choroid plexus, and anterior capsule of lens of eye

Question 29

Simple ciliated columnar epithelium may be found where

Answer 29

upper respiratory tract, uterine tubes, uterus, paranasal sinuses, and the central canal of the spinal cord.

Question 30

simple non-ciliated epithelium is found where

Answer 30

in the digestive tract beginning with the cardia of the stomach, the gall bladder, and in parts of the excretory ducts of glands

Question 31

Where is heavily stratified squamous with CT papillae found

Answer 31

Epidermis

Question 32

where is heavily stratified squamous epithelium without CT papillae found

Answer 32

The cornea

Question 33

Where is lightly or non-keratinized stratified squamous epithelium found

Answer 33

Esophagus, vagina, lining of the mouth, tongue, and part of the epiglottis

Question 34

Where is stratified cuboidal epithelium found

Answer 34

may occur in small areas of the anal mucosa, large excretory ducts of some glands, and part of the male urethra

Question 35

Where is stratified columnar epithelium found

Answer 35

ducts of adult sweat glands, fornix of the conjunctiva of the eye, parts of the male reproductive/urinary tract, the pharynx, and the epiglottis

Question 36

where is ciliated psuedostratified columnar epithelium is found where

Answer 36

Trachea

Question 37

where is psuedostratified epithelium with stereocilia found

Answer 37

in the epididymis

Question 38

Where is transitional epithelium found

Answer 38

Urinary system

Question 39

what are the two kinds of epithelium in terms of function

Answer 39

Covering/lining and glandular

Question 40

functions of epithelium

Answer 40

protection, maintain concentration differences, involved in secretion and absorption

Question 41

What epithelia are typically involved in secretion and absorption

Answer 41

simple columnar primarily functions in secretion of enzymes and mucous and absorption of nutrients and fluid