Fixations - Study guides, Class notes & Summaries
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HTL Fixatives questions with correct answers
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Most coagulant fixatives achieve their full effect on tissue at any particular depth as soon as... - Answer they have penetrated to that depth at a concentration sufficient to cause coagulation. 
 
Fixative - Answer alters tissue by stabilizing the protein so that it is resistant to further changes. 
 
A fixative must change... - Answer the soluble contents of the cell into insoluble substances so that those substances are not lost during the subsequent processing steps. 
 
Denaturation - ...
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Histotechnology - Fixatives, Stains questions well answered graded A+ 2023/2024
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Histotechnology - Fixatives, StainsAdditive fixatives - correct answers Chemically link, add themselves on to tissue and change it 
- Mercuric chloride 
- Chromium tetroxide 
- Zinc sulfate 
 
Nonadoptive fixatives - correct answers Organic compounds that act on tissue without chemically combining with it 
- Acetone 
- Alcohols 
 
Dissociate bound water molecules from tissue protein groups 
- Shrinkage, hardening with overexposure 
 
Coagulant fixatives - correct answers Establishes a network in...
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Histotechnology - Fixation with correct solutions 100%
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Histotechnology - FixationThe primary purpose of fixation is to: 
a. stop enzymatic action 
b. remove the water from the tissue 
c. provide support for the tissue 
d. autolyze the tissue - correct answers a 
 
Which of the following fixatives contains picric acid, formalin, and acetic acid? 
a. Zenker 
b. Helly 
c. Bouin 
d. Zamboni - correct answers c 
 
The volume of fixative should exceed the volume of the tissue by: 
a. 1 time to 2 times 
b. 5 times to 10 times 
c. 15 times to 20 ...
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Fixation NSH Self Exam Questions with correct answers
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The most important step in the preparation of high quality microscopic slides of tissue is: - Answer ensuring adequate fixation 
 
The breakdown of tissue due to enzyme activity is called: - Answer autolysis 
 
The breakdown of tissue by bacterial action is called: - Answer putrefaction 
 
A physical agent used in fixation is: - Answer heat 
 
The volume of fixing fluid employed should be: - Answer 15-20 times that of the tissue 
 
The rate of fixation varies with the fixative and is a...
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Histotechnology - Fixation questions & answers graded A+ passed
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Histotechnology - FixationWhat are the steps tissue must go through before it is viewed under a microscope? - correct answers 1. Fixation 
2. Processing 
3. Embedding 
4. Microtomy 
5. Staining 
6. Coverslipping 
 
Define fixation. - correct answers The preservation of cells and tissue in as life-like a way as possible by stabilizing the protein so that it is resistant to further changes. 
 
What are the functions of fixation? - correct answers 1. To prevent putrefaction and autolysis 
2. To hel...
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CSMLS Histology Fixation Questions with complete solutions.
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CSMLS Histology Fixation Questions with complete solutions. 
 
 
 
 
 
 
 
 
 
 
 
 
 
The primary purpose of fixation is to: 
a. stop enzymatic action 
b. remove the water from the tissue 
c. provide support for the tissue 
d. autolyze the tissue - correct answers.a. enzymes are proteins and rendered inactive by fixation 
 
Which of the following fixatives contains picric acid, formalin and acetic acid 
a. Zenker 
b. Helly 
c. Bouin 
d. Zamboni - correct answers.c. Bouin 
 
The ratio of f...
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BOC Study Guide Histotechnology 2nd Ed.- Fixation (HTL) With Complete Solutions Latest Update
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Microscopic examination of a PAS stained section reveals marked nonspecific staining. This could be caused by fixation in: - correct answers glutaraldehyde solution 
 
The pathologist is sure that urate crystals were present in a tissue biopsy and should therefore be present in the H&E stained section, but polarization of the tissue is negative. This could possibly result from the: - correct answers use of water-based fixative 
 
Formaldehyde reacts primarily with which of the following protein ...
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Histology (HT/HTL exam): Fixation questions with correct answers
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Histology (HT/HTL exam): Fixation questions with correct answers
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PSY QUIZ #10 WITH ANSWERS Self-Efficacy refers to our experience of our own... A) fixations B) superego C) competence D) self serving bias ANSWER = C) competence The defense mechanism in which self-justifying explanations replace the real, unconscious rea
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QUIZ #10 WITH ANSWERS 
Self-Efficacy refers to our experience of our own... 
A) fixations 
B) superego 
C) competence 
D) self serving bias 
ANSWER = C) competence 
The defense mechanism in which self-justifying explanations replace the real, 
unconscious reasons for actions is... 
A) projection 
B) denial 
C) rationalization 
D) displacement 
ANSWER = C) rationalization 
In western cultures, introversion is belittled in part because people tend to equate 
introversion with... 
A) selfishness 
B...
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Regulation of nitrogen fixation exam questions and answers
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Regulation of nitrogen fixation exam 
questions and answers 
nif cluster - Answer- a genetically linked and coordinately regulated group of operons 
encoding genes required for nitrogen fixation 
What is the EBP for nif genes? - Answer- NifA 
How does the activity of NifA differ from that of NtrC? - Answer- The unmodified form of 
NifA is active 
NtrC needs to be phosphorylated to be active 
Under what 2 conditions does nif transcription occur? - Answer- 1) Only in the absence 
of a fixed nitrog...
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