Histo Flashcards
Gap junctions use what protein
connexin
Occludin
Tight junctions
Strong attachment to neighboring cells
Why do serous stain darker?
they are water-based/hydrophillic
Microvillus do what?
increase absorption
What do seromucous look like?
white in the middle with dark border
Stereocilia/stereovillus
unsuually long microvillus made of actin
increase SA for absorption/secretion
flagella
modified cilia the help to move sperm
OCCULUDIN JUNCTION
IMPERMEABLE, ALLOW CELLS TO FX AS A BARRIER
TIGHT JUNCTIONS
INCREASE IN number of occluding junction does what to permability
decrease
anchoring junctions do what?
link cytoskeleton to adjacent cells
zonula adherens
interacts with the network of actin filaments in the cell
macula adherens
interacts with INTERMEDIATE FILAMENTS
simple squamous
location
fx
location: endothelium, mesothelium
exchange, barrier and lubricate
simple cuboidal
location
fx
location kidneys, bronchioles
ABS (absorp, barrier and secrete)
Simple columnar
location
fx
SI/GI tract, uterus
absorb and secret
Pseudostratified, columnar ciliated
nuclus are lined up (columnar)
location- pharnxy, trachae
fx- move debris
how is cilia different from stereocilia
cilia–> microtubule based structure
Stereocilia–> actin
urothelium
bladder, urethra
barrier and distensible
cells look like DOMES. if cells looks like DOMES, then urothelium
how to differentiate keratonized and non-keratonized?
kerotonized DO NOT have nuclei in the outermost layer
Stratified cuboidal
Location: sweat glands, ducts
fx–> barrier and passageway
mesothelium
simple squamous epithelium that is made up part of serous membrane
mucous cells look like what
completely clear. can barely see
pseudofied columnar with stereocilia look like what?
have thick apical extensions of sterocilia
