نماذج الاختبارات

choose the correct answer:

- The approximate thickness of ultra-thin sections is generally about

a.    70-80 Nanometers

b.    0.5-0.7 Micrometers 

c.     0.5-0.7 Nanometers 

d.    70-80 Micrometers

-Semi-thin sections are stained with

a-    Uranyle acetate and lead citrate.

b-   Join’s stain.

c-    Osmium tetroxide.

d-   Methylene blue stain.

-ultrathin sections are examine under

a.    Light microscope.

b.    Scanning Electron Microscope.

c.     Transmission Electron Microscope.

d.    Fluorescence Microscope.

answer the following questions

• Defects during polymerization .
• Advantages of using glass knife.
• Purpose of primary trimming.