Epithelium

Question 1

List general characteristics of epi tissues

Answer 1

Simple or stratified, classified by uniform shape of the superficial most layer. Tightly bound together, free surfaces,line body cavities, innervated tissues. Basement membrane1

Question 2

Major criteria used to classify epi tissues.

Answer 2

Simple or stratified
Squamous, cuboidal or columnar
Could have cilia, stereocilia, or microvill
Could be keratinized or not

Question 3

Characterize and compare the apical and basolateral domains of epithelium.

Answer 3

Apical Domains: could have cilia or microvilli apical domains face a lumen or external environment

Basolateral Domains: sides and bases have intracellular junctions and they are in contact with the BM

Question 4

Describe types of specialization on apical surfaces

Answer 4

Microvilli:
Cilia:
Sterocilia:

Question 5

Locations of Simple Squamous.

Answer 5

Lumina of ducts vessels and other tubular structures, makes walls of alveoli and Bowman’s capsules and inner membranes in ear.

Question 6

Describe structure of microvillus.

Answer 6

A

Question 7

Describe function of brush border.

Answer 7

Increase surface area to increase absorption

Question 8

Describe structure of a cilia.

Answer 8

9 microtubule doublets surrounding a central microtubule, each doublet consists of an alpha and beta tubule alpha tubule made of 13 protofilaments, and beta made of 10-11 protofilaments, each doublet is connected by dynenin arms for movement

Question 9

Describe structure of microvillus.

Answer 9

(Check) cross linked actin fibers, non motile

Question 10

Describe function of brush border.

Answer 10

Move particles along in places such as respiratory system or Fallopian tubes.

Question 11

Describe the basic structure for the generalized plasma membrane from Singer and Nicholson, with the arrangement of phospholipids and proteins.

Answer 11

Phospholipid bilayer

Question 12

Recognize which phospholipid classes are found in the outer leaflet and inner leaflet of men.

Answer 12

Cholesterol is found in both

Question 13

Describe he location and function of glycolipids in plasma membrane.

Answer 13

A

Question 14

Describe lipid rafts.

Answer 14

Af

Question 15

Describe glycocalyx, it location and functions.

Answer 15

A

Question 16

Differentiate peripheral and integral proteins including transmembrane an major characteristics

Answer 16

Peripheral proteins are found on the surface of the membrane
Integral proteins are embedded within but do not go all the way through
Transmembrane proteins go through the membrane

Question 17

Differentiate categories of transport proteins

Answer 17

A

Question 18

List major mechanisms for moving materials across meme and indicate if they are energy dependent and if they need transporters.

Answer 18

Active Transport: needs carrier requires energy
Facilitated Transport: no energy, but needs carrier
Simple Diffusion: no energy no carrier
Osmosis: no energy uses aquaporins move water across a membrane

Question 19

Describe basolateral modifications:

Answer 19

Basolateral modifications are hemidesmosomes linking the basal surface to the Basement membrane and desmosomes linking the lateral surfaces of cells together

Question 20

Simple Cuboidal location.

Answer 20

May have brush border such as kidney tubules, found on ovary, epithelium of retina, choroid plexus, anterior capsule of lens

Question 21

Location of Simple Columnar.

Answer 21

Could have microvilli, ciliated columnar is found in upper respiratory tract Fallopian tubes, sinuses and central canal of spinal cord. Non ciliated is in digeeestive tract, gall bladder and excretory ducts.

Question 22

Location of Stratified Squamous.

Answer 22

Keratinized: epidermis and in cornia,

Non-Keratinized: esophagus vagina mouth tongue and epiglottis

Question 23

Stratified Cuboidal Location.

Answer 23

Rarely found, but found in male urethra

Question 24

Location of Stratified Columnar.

Answer 24

Rarely found- but found in adult sweat glands, fornix of eye, male reproductive/urinary tracts, pharynx and epiglottis

Question 25

Location of Psuedostratified Epi.

Answer 25

Ciliated found in trachea

Pseudostratified with. Stereocilia found in epididymis

Question 26

Transisitional epi location.

Answer 26

Urinary system.

Question 27

Junctional complexes are associated with which cellular domains? 
A.Apical 
B. Basolateral
C.Basal only
D.Lateral only

Answer 27

Basolateral

Question 28

Transitional epi is associate with which f the following?
A.respiratory
B. Lymphatic
C.Cardio
D. Uriary

Answer 28

Urinary

Question 29

Not commonstratified cuboidal may e found in which area?
A.Vaginal Epithelium
B. Male urethra
C. Urinary bladder
D. Kidney tubules

Answer 29

A. Part of male urethra

Question 30

Lightly keratinized stratified squamous epi is in which location?
A. Vaginal epithelium
B. Skim
C.larynx

Answer 30

Vaginal Epithelium

Question 31

Basal Latina is associated with which collagen?

Answer 31

Type 4

Question 32

Which cell adhesion molecules is associated with zonal occludens and desmosomes?
A. Cadherins
B itegrins
C. Selections
D. Immunoglobulin

Answer 32

Cadherins