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++
