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c. to increase contrast of structures++



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c. to increase contrast of structures++
d. to decrease contrast of structures
e. to preserve tissue for a long time
1-3. Basic stains are bound with:
a. acid compounds of the histologic structures++
b. basic compounds of the histologic structures
c. mineral substances
d. neutral fat
e. glycogen of cytoplasm
1-4. Acid stains are bound with:
a. acid compounds of histologic structures
b. basic compounds of histologic structures++
c. mineral substances
d. neutral fat
e. glycogen of cytoplasm
1-5. Impregnation is due to the ability of histologic structures for:
a. being stained with acid dyes
b. being stained with basic dyes
c. reacting with periodic acid (PAS)
d. reducing salts of heavy metals++
e. being stainable with Sudan-III
1-6. Histologic sections are embedded in balsam or in any other synthetic medium with the following purpose:
a. to increase density of tissue
b. to decrease density of tissue
c. to increase contrast of tissue
d. to decrease contrast of tissue
e. to preserve histologic specimen for a long time++
1-7. If it is necessary to investigate fat inclusions in cells. Which fixator and stain is useful for that investigation:
a. formalin and Sudan III++
b. alcohol and pyronin G
c. alcohol and Feulgen stain
d. formalin and periodic acid Schiff reaction
e. alcohol and toluidine blue
1-8. If it is necessary to investigate cellular structures sized less than 0,2 micrometers. Which methods are useful for that investigation:
a. phase-contrast
b. luminescent
c. ultraviolet
d. electron++
e. densitometry


2. CYTOLOGY
2-1. Which of the following structures represents syncytium:
d. spermatogenic epithelium++


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