Compre Exam Flashcards
(139 cards)
What is the increase in the size of an organ due to an increase in the number of cells?
Hyperplasia
What is the most critical step in tissue processing?
Fixation
What type of necrosis is seen in a patient with pulmonary tuberculosis?
Caseous necrosis
PAS-positive substances are stained what color?
PAS-positive substances are stained what color?
How many changes of wax are required at 15-minute intervals to ensure complete removal of the clearing agent from tissue by manual impregnation?
Four changes
Jelly-like clots in peritoneal, pleural, and pericardial fluids may be prevented by the addition of what substance?
Heparin
What fluids are used for the diagnosis of rabies? (2)
Carnoy’s Fluid and Acetone
What is the recommended concentration of nitric acid, the most common and fastest decalcifying agent?
5-10%
Frozen sections are commonly used for which three purposes?
Rapid pathologic diagnosis during surgery, enzyme histochemistry, and demonstration of lipids
What is added to Mayer’s egg albumin to prevent the growth of molds?
A: Thymol crystals
A tissue exposed to short bursts of carbon dioxide for a few minutes will do what?
A: Freeze
What is the angle formed between the cutting edge of the microtome knife?
A: 27°-32°
What dehydrating agent contains hydrochloric acid?
A: Von Ebner’s Fluid
For the production of polyclonal antibodies, which animal is most frequently used?
A: Rabbit
What is used for the demonstration of neuroglia in frozen sections?
A: Victoria Blue
Which oxidizing agent cannot accelerate the ripening of hematoxylin?
A: Potassium chloride
What is considered to be the most dangerous type of microtome?
A: Standard Sliding Microtome
In the double embedding method, tissues are first infiltrated with what and then embedded in what?
A: Infiltrated with celloidin, then embedded in paraffin
Which clearing agent is recommended for clearing embryos, insects, and very delicate specimens?
A: Aniline Oil
Removal of excessive mercuric fixatives is accomplished by using what?
A: Alcoholic Iodine
Which embedding mold is not dispensable?
A: Plastic Embedding Rings and Base Mold
What is considered to be the most rapid fixative?
A: Carnoy’s Fluid
Which direction is correct for stropping in knife sharpening?
A: Toe to Heel Direction
In the processing of tissues, when is infiltration done?
A: After clearing, before embedding