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Staining Properties
WVSOM Class of 2012 Staining Properties
Question | Answer |
---|---|
hematoxylin is what kind of stain? | a dark blue or purple dye; anything that stains with hematoxylin is called basophilic |
eosin is what kind of a stain? | an acidic dye that stains basic components red or pink; structures that stain with eosin are called acidophilic or eosinophilic |
why do the nuclei in cells stain blue? | because of the heterochromatin (ionized phosphate) that resides within it |
what color is the nucleolus? | basophilic |
silver stain is for what kind of tissues? | nervous tissue, reticular fibers (type III collagen) |
which stain stains glycogen & various carbohydrates with aldehyde? | PAS |
what is the goal of immunocytochemstry? | visualize some component in a tissue section by means of an antibody |
what structures does hematoxylin stain? | acidic structures (DNA & RNA) |
which H & E stain is more specific? | hematoxylin |
is the ECM basophilic or eosinophilic? | eosinophilic |
what stain is used for elastic fibers that don't stain well with H & E? | elastic stain |
elastic stain stains fibers what color? | purple or black |
which stain is used to stain collagen? | masson's trichrome (also called connective tissue technique) |
trichrome stain stains nuclei what color? cytoplasm? connective tissue? | the nuclei appear blue, the cytoplasm a bright red, and the connective tissue aqua bluegreen |
tissues or cells that stain with a silver salt are referred to as what? | argyrophilic |
PAS stains what color? | dark magenta |
why do basement membranes stain magenta with PAS? | proteoglycans |
PAS is commonly used to look at what structure? | bowman's capsule |
these stains cause tissue to take on a different color than the dye: | metachromic stains |
what is the most common artifact in slides? | shrinkage |