HISTO By MR. AFRICA Flashcards
It is the best fixative for blood smears is:
a. bouin’s solution
b. carnoy’s fluid
c. methanol
d. osmium tetroxide
methanol
Helly’s fluid contains all of the following except:
a. Mercuric chloride
b. potassium dichromate
c. sodium sulphate
d. glacial acetic acid
glacial acetic acid
This is the best decalcifying agent:
a. nitric acid
b. formic acid
c. TCA
d. acetic acid
nitric acid
Paraformaldehyde deposits are be removed by addition of:
a. saturated alcoholic picric acid
b. alcoholic lithium chloride
c. iodine & sodium thiosulfate
d. 10% methanol
10% methanol
For chromic acid fixed tissue, what is used to wash the specimen?
a. tap water
b. 70% ethanol
c. alcoholic iodine
d. potassium permanganate
tap water
The fixation begins at the:
a. center-outward
b. center-inward
c. periphery-outward
d. periphery-inward
periphery-inward
For most fixatives, the volume of fixing fluid in relation to the volume of the tissue should be:
a. 2-5 times
b. 6-9 times
c. 7-12 times
d. 10- 20 times
10- 20 times
One of the action of acetic acid is to:
a. preserves nucleoproteins
b. fixes chromosomes
c. preserves the chromatin
d. All of these
All of these
Which of the following fixatives has a mordanting effect towards the tissues?
a. carnoy’s solution
b. 10% formalin
c. absolute alcohol
d. zenker’s solution
zenker’s solution
This clearing agent has a toxic & carcinogenic effect on the worker, and can cause aplastic anemia on prolonged exposure:
a. chloroform
b. xylene
c. benzene
d. toluene
benzene
In electron microscopy, glutaraldehyde function as a:
a. dehydrating agent
b. clearing agent
c. embedding agents
d. fixatives
fixatives
This fixative requires less amount for it to exerts it action:
a. acetone
b. Flemming’s solution
c. trichloroacetic acid
d. Formalin
Flemming’s solution
This fixative is incorporated to other fixatives because of its
swelling effect?
a. flemming’s w/o acetic acid
b. acetone
c. trichloroacetic acid
d. flemming’s solution
trichloroacetic acid
This is the process of removing intercellular & extracellular water from the tissue:
a. decalcification
b. dealcoholisation
c. dehydration
d. clearing
dehydration
Which fixative is good for electron microscopy?
a. 10% NBF
b. Glutaraldehyde
c. acetone
d. Orth’s
Glutaraldehyde
Which reagent/s is/are both acting as a dehydrating & clearing
agent?
a. dioxane
b. THF
c. both
d. Neither
both
With this reagent, the tissue has the tendency on the solution?
a. tetrahydrofuran
b. Clove oil
c. benzene
d. Chloroform
Chloroform
After the clearing process, xylene turns milky, it signify
incomplete _________?
a. fixation
b. Dehydration
c. both
d. Neither
Dehydration
Which of the following methods is not used to remove the
paraformaldehyde deposits?
a. filtration
b. 10% methanol
b. All of these
e. None of these
None of these
Reason why the acetic acid is removed from the solution of Flemming:
a. remove the artefacts
b. improves nuclear details
c. improves cytoplasmic details
d. remove paraformaldehyde deposits
improves cytoplasmic details
Which is not a physiologic atrophy?
a. uterus after delivery
b. Thymus during puberty
c. pressure atrophy
d. Atrophy of the brain during late adulthood
pressure atrophy
Tissue size increases because of size increase of the individual cells:
a. hypertrophy
b. Hyperplasia
c. metaplasia
d. Dysplasia
hypertrophy
Failure of an organ to reach its full, mature size:
a. atresia
b. Aplasia
c. anaplasia
d. Agenesia
Aplasia
Most commonly seen in one of paired structures like the kidneys:
a. atresia
b. Aplasia
c. anaplasia
d. Agenesia
Aplasia
Atrophy because of decrease workload of an organ:
a. pressure atrophy
b. Exhaustion atrophy
c. starvation atrophy
d. Atrophy of disuse
Atrophy of disuse
In the classification of epithelial tissue, this stratification is described as appearing to have more than one layer but all cells contact the basement membrane:
a. simple epithelium
b. stratified epithelium
c. pseudostratified epithelium
d. AOTA
pseudostratified epithelium
The changes in the myocardium due to increased functional
demand as seen in hypertensive heart disease are considered to be:
a. pathologic hypertrophy
b. physiologic hypertrophy
c. pathologic hyperplasia
d. physiologic hyperplasia
pathologic hypertrophy
Malnutritional condition such as Marasmus and kwashiorkor are classified under this type of atrophy:
a. pressure atrophy
b. endocrine atrophy
c. senile atrophy
d. nutritional atrophy
e. disuse atrophy
nutritional atrophy
Improper preservation of the tissue that resulted to decay of the specimen, is due to:
a. delay in fixation
b. rapid penetration of fixative
c. prolonged storage of tissue in the fixative
d. rapid dehydration, clearing, embedding, and cutting
delay in fixation
This fixative is composed of Chromic acid, osmium tetroxide, and potassium dichromate:
a. flemming’s fluid
b. flemming’s w/o acetic acid
c. TCA
d. Champy’s fluid
Champy’s fluid
Decreased workload on the skeletal muscle results in:
a. pressure atrophy
b. endocrine atrophy
c. senile atrophy
d. disuse atrophy
disuse atrophy
It is a specialized type of epithelial tissue which forms moist lining of body openings.
a. keratinized squamous epithelium
b. non-keratinized squamous epithelium
c. non-ciliated columnar epithelium
d. glandular epithelium
non-keratinized squamous epithelium
This is a finger-like extensions of the plasma membrane whose
purpose is to maximize surface area in the small intestines:
a. cilia
b. Fibers
c. acini
d. Goblet cells
cilia
Which of the following is a type of nonstriated and involuntary muscle tissue?
a. cardiac muscle tissue
b. smooth muscle tissue
c. skeletal muscle tissue
d. nervous tissue
e. NOTA
smooth muscle tissue
What is the refractive index of the glass slide?
a. 1.581
b. 1.851
c. 1.185
d. 1.518
1.518
The temperature of the cryostat is maintained at what temperature?
a.0 to -10C
b.40 to 60C
c.-18 to -20 *C
d.5- to -10 *C
-18 to -20 *C
Ringing is perform to:
a. Remove the bubbles in the slide
b. Prevent escape of the mountant
c. Better preserve the tissue
d. To focus the tissue in the center
Prevent escape of the mountant
Saffron is extracted from:
a. tree
b. vegetable
c. flower
d. Bug
flower
Example of mounting agent:
a. Clarite
b. Entallan
c. Canada balsam
d. AOTA
e. NOTA
AOTA
Which is not a purpose of flotation bath?
a. To dissolve the wax
b. To soften the wax
c. To straightened the section
d. To stretch the section
To dissolve the wax
Krognic cement is used as:
a. Ringing agent
b. Mountant
c. Adhesive
d. Coverslip
Ringing agent
Purpose of mounting of section:
a. For easy identification of slide
b. For safe keeping of glass slide
c. Protection of tissue from oxidation
d. Enhance the stain of the tissue
Protection of tissue from oxidation
It is an outstanding agent because it can fix, differentiate and stain the tissue all by itself:
a. Methylene blue
b. Neutral red
c. Janus green
d. Picric acid
Picric acid
Tissues such as non-fatty breast tissues is cut at which of the following temperature in cryostat?
a. -5°C
b. -15°C
c. -36°C
d. -70°C
-15°C
Cellular adaptation due to increased cytoplasmic protein triggered by growth factors:
a. agenesis
b. hyperthrophy
c. hyperplasia
d. metaplasia
hyperthrophy
This is a fixative that can cause a allergic dermatitis, sinusitis,
rhinitis and lacrimation:
a. zenker’s fluid
b. mercuric chloride
c. formaldehyde
d. ethanol
formaldehyde
This fixative has an anti-fungal effect:
a. picric acid
b. Heidenhain’s susa
c. formaldehyde
d. Helly’s solution
formaldehyde
Act as a fixative and a strong oxidizing agent:
a. chromic acid
b. Cedarwood oil
c. lead acetate
d. Moller’s reagent
chromic acid
All of the following is part of the usual histotechniques, except:
a. decalcification
b. Fixation
c. dehydration
d. Clearing
decalcification
Only aldehyde fixative that do not cause irritation ( dermatitis):
a. 10% formalin
b. 10% formol-saline
c. formol-sublimate
d. glutaraldehyde
glutaraldehyde
Transitional cell carcinoma of the bladder and the mucinous ovarian tumor are usually positive for
a. CK7
b. CK20
c. Both A and B
d. Neither A nor B
Both A and B
The best screening marker for lymphoma is
a. CD3, CD4, CD8
b. LCA or CD45
c. CD19, CD20, CD23
d. CD15, CD30
LCA or CD45
If the clearing agent turned milky as soon as the tissue is placed in it, the most probable reason is
a. Insufficient impregnation
b. Prolonged dehydration
c. Delayed fixation
d. Incomplete dehydration
Incomplete dehydration
The plasma-thrombin method is a technique in preparing
a. Smears for cytology
b. Adhesive
c. Cell block
d. Decalcification technique
Cell block
Small pieces of tissue not >1mm diameter is placed on the slide—forcibly compressed with another slide or coverslip.
a. Teasing or dissociation
b. Squash preparation(crushing)
c. Smear preparation
d. None of the above
Squash preparation (crushing)
Hydrogen peroxide and potassium permanganate converts
hematoxylin into
a. Stable hematin
b. Mercuric oxide
c. A weak base
d. A weak acid
Stable hematin
Selected tissue is immersed in a watch glass with isotonic
solution and careful—dissected or separated
a. Teasing or dissociation
b. Squash preparation (crushing)
c. Smear preparation
d. None of the above
Teasing or dissociation
Microtome with CO2 or cryostat cold chamber is maintained at what temperature?
a. temp 0 to -10C
b. temp 0 to -20C
c. temp -10 to -20C
d. temp -30 to -40C
temp -10 to -20C
Most rapid agent but one of its disadvantage is soft tissue crack due to ice crystal (freeze artifact) formation?
a. aerosol spray
b. carbon dioxide gas
c. isopentane cooled by liquid nitrogen
d. liquid nitrogen
liquid nitrogen
Most common injury related work in histopath
a. Burn injury
b. Chemical spill injury
c. Electrical burn injury
d. cutting the finger or hand with microtome knives
d. cutting the finger or hand with microtome knives
Most important step in operating equipment.
a. Learn basic before use
b. Never attempt to set up w/out approval of manufacturer
c. Operating manual provide info to machine operation
d. Read the manual
Read the manual
Inadequate decalcification result in the following, except:
a. damage to the knife edge during sectioning
b. disruption of the surrounding tissue
c. poor cutting of hard tissues
d. poor staining procedure
poor staining procedure
Fixation most common for amino acid histochemistry.
a. Alcohol fixative
b. Alcoholic formaldehyde
c. Neutral buffered formol saline or formaldehyde
d. Karnovsky’s formaldehyde-glutaraldehyde solution
Karnovsky’s formaldehyde-glutaraldehyde solution
The following would require washing out of excess fixative with water, except.
a. Bouin’s Solution
b. Flemming’s Solution
c. Kelly’s Solution
d. Zenker’s Solution
Bouin’s Solution
After processing and the paraffin-embedded block has been trimmed, the tissue reveals a “grating”, resistance sensation when sectioned with a microtome knife. What will be your best action as a med tech?
a. Remove the tissue block from the chuck and place it face down on a pad of cotton /gauze moistened and saturated with l0% acetic acid for one hour. Adjust staining.
b. Remove the tissue block from the chuck and melt paraffin and repeat decalcification.
c. Remove the tissue block from the chuck and place it face down on a pad of cotton /gauze moistened and saturated with l0% hydrochloric acid for one hour. Adjust staining.
d. Repeat the processing and decalcification of the tissue
Remove the tissue block from the chuck and place it face down on a pad of cotton /gauze moistened and saturated with l0% hydrochloric acid for one hour. Adjust staining.
Rapid decalcifying agents are most likely to adversely affect any
subsequent staining, causing the
a. Cell nuclear chromatin to take up too much hematoxylin and other
basic dyes
b. Failure of acid dyes to stain tissues
c. Staining of acid dyes eosin is not affected produce a bright red
stain with differential shading.
d. Failure of nuclear chromatin to take up hematoxylin and other
basic dyes
Failure of nuclear chromatin to take up hematoxylin and other
basic dyes
Decalcifying agents that combine with calcium ions and salts (e.g. iron and magnesium deposits) to form weakly dissociated complexes
and facilitate removal of calcium salt.
a. Acids
b. Chelating agents
c. Electrical ionization (electrophoresis)
d. Ion exchange resins
Chelating agents
A toxic dehydrating agent, primarily employed for blood, tissue films and smear preparation.
a. Ethyl alcohol
b. Methyl alcohol
c. Butyl alcohol
d. Isopropyl alcohol
Methyl alcohol
It is Indication of the full saturation of dehydrating fluid with water, using a layer of anhydrous copper sulfate
a. clearing of solution
b. no discoloration/ transparent copper sulfate crystals
c. blue discoloration of copper sulfate crystals
d. white discoloration of copper sulfate crystals
blue discoloration of copper sulfate crystals
Characteristics of an Ideal Dehydrating Solution, except.
a. dehydrate rapidly without producing considerable shrinkage or distortion of tissues.
b. evaporate very fast.
c. be able to dehydrate even fatty tissues.
d. not remove stains.
evaporate very fast.
Gross description of tissue after clearing, if there is no complete
dehydration of tissue.
a. Bluish color
b. Milky/Whitish appearance
c. Translucent/ transparent
d. Yellow pigmentation
Milky/Whitish appearance
The most sensitive of the oil soluble dyes with greater affinity for
phospholipids and neutrall fats (TAG), but not with crystalline
cholesterol, and free fatty acids:
a. Sudan Black B
b. Sudan IV
c. Sudan III
d. Oil Red O
Sudan Black B
A fluorescent dye that is also used with osmic acid to fix and stain
blood and glandular tissues:
a. Rhodamine B
b. Osmic tetroxide
c. Orcein
d. Neutral red
Rhodamine B
A marker normally present in mesenchymal cells and used in
identification of mesenchymal tumors (leiomyoma,
rhabdomyosarcoma, myogenic component of malignant mixed
mesodermal tumors)
a. Desmin
b. Myogenin
c. GFAP
D. Neurofilament
Desmin
Which of the following cells have a “honeycomb appearance” when viewed on end?
a. Endometrial cells
b. Doderlein bacillus
c. endocervical glandular cells
d. basal cells
endocervical glandular cells
Criteria for cytologic diagnosis of normal pregnancy except:
a. Less than 30% superficial cells
b. Doderlein-filled “dirty” background
c. At least 20% of intermediate cells in clusters
d. Marked progesterone effect
At least 20% of intermediate cells in clusters
Which class in the Papanicolau method of reporting is reported as ASCUS in the Bethesda 2001 method?
a. Class I
b. Class II
c. Class III
d. Class IV
b. Class II
Aplastic anemia and bone marrow disease is attributed mostly
to:
a. aniline oil
b. benzene
c. Clove oil
d. carbon tetrachloride
benzene
What color do elastic fibers stain with Verhoeff Elastic stain?
a. Red/Orange
b. Pink/red
c. Purple/Red
d. Blue/black
Blue/black