Flashcards in 4.2 lab - connective tissue Deck (22)
will a correct exam answer choice ever be "fat" or "adipocyte" ?
no - must always specify unilocular vs multilocular
T/F all fibers stain eosinophilic
mostly true. must use special stains to bring out reticular (silver) and elastic fibers (vaerhoeff's)
loose vs dense irregular connective tissue, which will likely have deeper eosinophilic stain?
dense - more eosinophilic fibers
explain the occasional appearance of an island of loose connective tissue within the epithelial epidermal layer of the skin
plane of section
what is one place that loose and dense irregular connective tissue appear side-by-side?
layer of looser connective tissue in skin (immediately below epidermis, superficial to reticular dermis)
layer of denser connective tissue in skin (below both epidermis and papillary dermis)
are melanocytes found in the papillary dermis?
no, melanocytes are found at the basal end of the epidermal epithelium
the fibrous component of most loose and dense connective tissue is...
type I collagen
the tunica intima (inner layer) of most arteries is a good place to find what kind of fibers?
(composing the inner elastic lamina)
on H&E, how will elastic fibers stain, in comparison to collagen I fibers?
slightly lighter (less eosinophilic)
much thinner fibers
best visualized with special vaerhoeff's stain
how is a spread preparation different from the usual slide preparation?
multiple cell layers (not just one)
between elastic and reticular fibers, which is more spaghetti web-like and which is more root-like?
-elastic: spaghetti web - not anchoring cells just filling space for stretching between structures
-reticular: roots - like roots burrowing between and among cells, providing scaffolding and structure
what are 2 characteristics of organs in which you might expect to find reticular fibers?
-composed chiefly of migratory cells (e.g. lymph nodes or spleen)
-organization is such that connective tissue support should be minimized (e.g. lung, liver)
what is the main fiber type found in embryonic mesenchymal tissue?
type III collagen, reticular fibers
type IV collagen forms part of what layer of the basement membrane?
in what organ is the epithelial basement membrane thicker than usual?
to block travel of nasty air stuffs to deeper layers
what protein is a major component of the lamina lucida layer of basement membranes?
why do basement membranes stain deep pink with PAS?
laminin, a glycoprotein, is a major component of the lamina lucida
what is the name for the microvilli border of kidney tubules?
in the kidney, this collection of tissue is the first blood filter