Question 1

This consists of two L-shaped strips of heavy brass or metal arranges on a flat metal plate and can be moved to adjust the size of the mold to the size of the specimen.

Accepted Answer

A) Leuckhart's embedding mold 
B) Plastic embedding rings and base mold 
C) Disposable Embedding molds 
D) All of the above except C.

Question 2

Which of the following acids is a moderate-acting decalcifying agent with less distortion of the sample tissue?

Accepted Answer

A) Citric acid 
B) Formic acid 
C) Hydrochloric acid 
D) Trichloroacetic acid

Question 3

What is the simplest, most common embedding medium used for routine tissue processing?

Accepted Answer

A) Celloidin wax 
B) Paraffin wax 
C) Gelatin wax 
D) Both A and C

Question 4

The following statements describe an ideal dehydrating solution, except:

Accepted Answer

A) It must dehydrate rapidly without producing considerable shrinkage or distortion of tissues. 
B) It should evaporate very fast 
C) It should not harden the tissues excessively 
D) It should not remove stains

Question 5

These are substances which combine calcium ions and other salts to form weakly dissociated complexes and facilitate removal of calcium salt.

Accepted Answer

A) Acids 
B) Ion exchange resins 
C) Chelating agents 
D) Electrophoresis

Question 6

Which of the following mineral acids is known to be the fastest acting decalcifying agent?

Accepted Answer

A) Hydrochloric acid 
B) Formic acid 
C) Nitric acid 
D) Citric acid

Question 7

All of the following statements are true about the factors that influence the rate of decalcification, except:

Accepted Answer

A) The rate of decalcification will depend upon the fixative used. 
B) The rate of decalcification will depend upon the structure of the specimen. 
C) The rate of decalcification will depend upon the volume and concentration of the solution used. 
D) The rate of decalcification will depend upon temperature.

Question 8

This clearing agent is commonly used as a substitute for Xylene and Benzene.

Accepted Answer

A) Toluene 
B) Cedarwood oil 
C) Tetrahydrofuran 
D) Clove oil

Question 9

What is the usual range of temperature of a water bath that removes the paraffin wax from the tissue?

Accepted Answer

A) 50-60 degrees Celsius 
B) 45-50 degrees Celsius 
C) 35- 45 degrees Celsius 
D) 70-80 degrees Celsius

Question 10

What type of embedding medium is used when the tissues are to be subjected to histochemical and enzyme studies?

Accepted Answer

A) Paraffin 
B) Ester wax 
C) Gelatin 
D) Celloidin

Exam 4: Processing and Embedding