HTL Prep questions with correct answers

The primary purpose of fixation is - Answer To stop enzymatic action Which fixative contains picric acid, formalin, and acetic acid? - Answer Bouin The volume of fixative should exceed the volume of the tissue by - Answer 15-20 times Tissue must be washed in water after fixation in - Answer Zenkers Which fixative contains formalin, potassium dichromate, and mercuric chloride? - Answer Helly Precipitate left in tissues that have been fixed in solutions containing mercuric chloride may be removed by immersion in - Answer Iodine Commercial stock formaldehyde solutions contain - Answer 37-40% formaldehyde Formalin pigment would most certainly be formed when the pH of the formalin is - Answer 5.0 Formalin pigment may be removed from tissue by - Answer Alcoholic picric acid 10% formalin is the same as - Answer 4% formaldehyde