gomori methenamine silver Flashcards by tanee h | Brainscape

Q

purpose/target in GMS

A

fungi

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Q

counterstain in GMS

A

light green

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Q

what colour is the background in GMS?

A

green

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Q

what colour is the target in GMS?

A

walls of fungal organisms stain brown/black

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Q

mechanism/principle of GMS

A

silver impregnation

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Q

control tissue for GMS

A

anything containing the target fungus

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Q

colour of mucin in GMS?

A

taupe/dark grey

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Q

colour of reticulin and basement membranes in GMS?

A

black

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Q

purpose of sodium thiosulphate in GMS

A

remove unreduced silver

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Q

purpose of gold chloride in GMS

A

toning

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Q

purpose of chromic acid in GMS

A

oxidizes the polysaccharides into aldehydes

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Q

which substance oxidizes polysaccharides into aldehydes in GMS?

A

chromic acid

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Q

which substance tones the silver in GMS

A

gold chloride

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Q

which substance removes unreduced silver in GMS

A

sodium thiosulphate

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Q

what substance removes excess chromic acid in GMS

A

sodium bisulfite

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Q

purpose of sodium bisulfite in GMS

A

remove excess chromic acid

Q

working solution in GMS?

A

methenamine silver (binds to aldehydes)