epithelium (fist part- types of epithelium) online module W2

Question 1

what is a tissue

Answer 1

a group of cells that are similar in structure and function

Question 2

what are the four types of tissue present in humans

Answer 2

epithelial
connective
muscle
nervous

Question 3

two ways in which cells form tissues

Answer 3

ECM

cell junctions

Question 4

are epithelial tissues very cellular?

Answer 4

yes

Question 5

what is the basement membrane made out of

Answer 5

blasal lamina, reticular lamina

Question 6

what is the name of the top surface of an epithelial cel

Answer 6

apical surface

Question 7

what is the name of the side surface of an epithelial cell

Answer 7

lteral surface

Question 8

what in the name of the bottom side of an epithelial cell

Answer 8

basal surface

Question 9

what are the four characteristics of epithelial tissue

Answer 9

supported - sitting on connective tissue
avascular - no blood vessels
regenerative - undergoes mitosis
cell membrane specializations

Question 10

what are the apical, lateral and basal specialisations of epithelial tissue

Answer 10

apical - microvilli cilia sereocilia
lateral - cell junctions
basal - cell junctions and basal lamina

Question 11

two ways that epithelial cells may be classified

Answer 11

by shape of cells on surface

by number of cell layers

Question 12

classification of epithelial tissue - number of layers (2)

Answer 12

simple

stratified

Question 13

classificationof epithelial tissue shape (3)

Answer 13

columnar
cuboidal
squamous

Question 14

nine common types of epithelia found in human body

Answer 14

• simple squamous
• simple cuboidal
• simple columnar
• stratified squamous
• stratified cuboidal/columnar
• pseudostratifiedd columnar
• transitional

Question 15

where can the simple squamous epithelium be found (3) specific
(2) broad

Answer 15

• aveoli of lungs
• glomerulus of kidneys
• lining of capillaries
• lining ograns (eg intestines)
• lining cardiovascular system (heart and blood vessels)

Question 16

simple squamous epithelium provides ….(2)

Answer 16

• a barrier of least resistance to diffusion

- smooth frictionless surface

Question 17

simple cuboidal epithelium provides …(1)

and is involved in (2)

Answer 17

a simple channel for the movement of substance

secretion or absorbtion

Question 18

where can simple cuboidal epithelium be found (1) broad

(2) examples

Answer 18

lining of ducts and tubules
eg
ducts in partoid salivary gland
kidney tubules

Question 19

simple columnar epithelium provides..(1) and is involved in.. (2)

Answer 19

-minimal barrier

• absorption (if cells have microvilli)
• movement along surface (if cells have cilia )

Question 20

where can simple columnar epithelium be found (1) microvilli eg
(1) cilia eg

Answer 20

gastrointestinal tract (microvilli)

female reproductive tracts (with cilia)

Question 21

name two types of stratified squamous epithelia

Answer 21

stratified squamous keratinised

statified squamous non-keratinised

Question 22

stratified squamous epithelium provides a ……, …… ……. to ……..
in either a ……. or ….. environment

Answer 22

solid smooth barrier
abrasion
dry(keratinised)
wet (nonkeratinised)

Question 23

where can stratified squamous non-keratinised epithelium be found (1) broad
(3) specific

Answer 23

moist environments

oral cavity, vagina, anal canal

Question 24

where can stratified squamous keratinised epithelium be found (1) broad (1)specific

Answer 24

dry environments

epidermis of skin

Question 25

what does stratified cuboidal/columnar epithelium look like

Answer 25

layer of cuboidal cells, with columnar cells ontop

Question 26

stratified cuboidal/columnar epithelium provides .... and is NOT involved in .... just transmition of fluids from ...... to .......

Answer 26

solid conduit for transport of substances NOTinvolved in secretion/absorbtion just transmition of fluids from glands to epithelial surfaces

Question 27

where is stratified columnar/cuboidal epithelium found (1) braod area, (3) examples

Answer 27

sufaces of major ducts eg salivaryglands pancreas liver

Question 28

pseudostratified columnar epithelium is most commonly used to .... in the ....... less commonly used for... in the ....

Answer 28

transport material along its surface in the respiratory tract absorption and cellular modification in the male reproductive tract

Question 29

what type of epithelium lines respiratory tract the male reproductive tract

Answer 29

pseudostratified ciliated epithelium pseudostratified columnar with stereocilia

Question 30

transitional epithelium provides........(1)due to .....(1)

Answer 30

a solid barrier to the movement of any substances | duet to tight junctions

Question 31

what allows transitional epithelium to expand to accommodate greater volume

Answer 31

intracellular membrane `

Question 32

where is transitional epithelium found (1) and (3) eg

Answer 32

exclusively in the urinary system | eg ureter, urinary bladder, urethera

Question 33

what shape are surface cells in a transitional eputhelium

Answer 33

dome shaped

Question 34

why is transtional epithelium water tight

Answer 34

because of the numerous tight junctions it has