HISTOPATH PRE-TEST

In fixation, the ideal pH of the solution is:

• between pH 6 and 8

• between pH 5 and 7

• between pH 7 and 9

• between pH 4 anf 7

Formaldehyde used in fixation is usually at what concentration?

• 5%

• 10%

• 20%

• 25%

In fixation, the volume of fixative is:

• 5 times the tissue volume

• 10 times the tissue volume

• 15 times the tissue volume

• 20 times the tissue volume

All of the following are nuclear fixatives, except:

• Brasil's solution

• Formol sublimate

• Muller's fluid

• Heidenhain's Susa

B-5 fixative is commonly used for:

• Tumor Biopsies

• Routine post-mortem tissues

• Central Nervous System Tissues

• Bone Marrow Biopsies

The most commonly used decalcifying agent is:

• Von Ebner's Fluid

• Nitric Acid

• Formic Acid

• Chromic Acid

The recommended ratio of fluid to tissue volume for decalcification is:

• 5 to 1

• 10 to 1

• 15 to 1

• 20 to 1

A measure of decalcification recommended for routine purposes which detect the presence of calcium in the solution.

• Physical Test

• Radiological Method

• Chemical Test

• None of the above

Which among the alcohols is considered as the best dehydrating agent?

• Methyl Alcohol

• Ethyl Alcohol

• Butyl Alcohol

• Denatured Alcohol

Acetone can dehydrate tissue samples for:

• 1/2 hours

• 1/2 to 2 hours

• 2 to 3 hours

• 2 to 4 hours