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Cytology - Epithelium
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Which cells have cell-cell connection?
1) zonula adherens
2) desmosomes
3) focal contact
4) hemidesmosome
1 and 2
which cells have cell to matrix connections?
1) zonula adherens
2) desmosomes
3) focal contact
4) hemidesmosome
focal contact and hemidesmosome
which filaments are made of actin?
1) zonula adherens
2) desmosomes
3) focal contact
4) hemidesmosome
zonula adherens and focal contact
which filaments are made of intermediate filaments?
1) zonula adherens
2) desmosomes
3) focal contact
4) hemidesmosome
desmosomes and hemidesmosomes
which type of filament is stronger?
a) actin
b) intermediate filament
intermediate filament
which type of filaments are made of cadherin?
1) zonula adherens
2) desmosomes
3) focal contact
4) hemidesmosome
zonula adherens and desmosomes
which type of protein is Ca++ independent?
a) cadherin
b) integrin
integrin
which type of transmembrane protein is Ca++ dependent?
a)cadherin
b) integrin
cadherin
which side of the cell do zonula work on?
a) basal
b) lateral
c) apical
lateral
which side of the cell do desmosomes work on?
1) basal
2) lateral
3) apical
lateral
which side of the cell do focal contacts work on?
1) basal
2) lateral
3) apical
basal
which side of the cell do hemidesmosomes work on?
1) basal
2) lateral
3) apical
basal
classify simple epithelia
one layer of cells
classify squamous cells
flat with elongated nuclei
describe cuboidal cells (and nuclei)
square with round nuclei
classify columnar cells (and nuclei)
tall and rectangular, with nuclei twds bottom
describe simple squamous epithelium
single layer
squamous cells
flattened nuclei
where do you find simple squamous epithelium?
lining vascular system
lining body cavities
lining respiratory spaces
function of simple squamous cells
barrier
diffusion of gases
name the types of simple squamous epithelium
endothelium
: blood vessels and heart
mesothelium
: body cavities
describe simple cuboidal epithelium
square
single layer of cells
round nuclei
location of simple cuboidal epithelium
kidney (tubules)
various ducts (glands)
list functions of simple cuboidal epithelium
barrier
secretion
absorption
describe simple columnar epithelium
tall columnar cells
oval-shaped nuclei
surface modifications
: microvilli(striated border) or cilia
location of simple columnar epithelium
non-ciliated
: GI tract, gallbladder
ciliated
: oviduct
functions of simple columnar epithelium
absorption
secretion
lubrication
transport
name 2 types of pseudostratified columnar epithelium
columnar cells
basal cells (=progenator cells)
describe columnar epithelium
made of 2 types of cells (columnar and basal)
oval-shaped nuclei
surface modifications
: ciliated vs. non-ciliated
what are the pseudostratified columnar subtypes?
ciliated
non-ciliated
where do you find ciliated pseudostratified columnar epithelium?
trachea
bronchi
where do you find non-ciliated pseudostratified columnar epithelium?
epididymis
seminal vesicle
function of ciliated pseudostratified columnar epithelium?
protection
movement (mucus)
found in trachea and bronchi
function of non-ciliated pseudostratified columnar epithelium?
absorption
found in: epididymous
what is metaplasia?
when a stimulous affects cilia
how do you characterize stratified squamous cells?
outermost layer = squamous (flat)
multiple cell layers
what does a keratinized cell look like? why/what is keratine?
wavy on top
keratine is dead cell matter along surface layer
what does keratin do?
serves as protection (best!)
describe statified cuboidal cells
2 layers of cuboidal cells
describe stratified columnar cells
top layer = columnar
2nd layer = cuboidal
describe transitional epithelium
- must have dome cells!
- otherwise, it looks like statified epithelium
- dome cells on surface can change shape as organ stretches/contracts
- dome cells are often bi-nuclear!
location of transitional cells
urinary system: ureter, bladder, kidney
exocrine glands secrete where?
into ducts
endocrine glands secrete where?
internally: to blood or lymph (no ducts!)
describe exocrine vs. endocrine shape
exocrine:
endocrine:
exocrine
: maintains connection to originating epithelium
endocrine
: loses connection to originating epithelium
Author
kalina
ID
31346
Card Set
Cytology - Epithelium
Description
8/25/10 - 8/25/10 notes
Updated
2010-08-26T20:44:19Z
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