HISTOPATHOLOGY & MT LAWS PROGRESS EXAM PART 2

52問 • 1年前

問題一覧

Beneficence is: * 0/1 Providing informed consent Conducting walk-throughs Addressing workplace bullying and violence Not singling our workers/groups for hazardous duties

Conducting walk-throughs

Nonmaleficence is: * 1/1 Providing informed consent Conducting walk-throughs Addressing workplace bullying and violence Not singling our workers/groups for hazardous duties

Addressing workplace bullying and violence

During acute inflammation, histamine-induced increased vascular permeability causes the formation of exudates (inflammatory edema). Which one of the listed cell types is the most likely source of the histamine that causes the increased vascular permeability? * 0/1 Endothelial cells Fibroblasts Lymphocytes Mast cells Neutrophils

Mast cells

What type of leukocyte actively participates in acute inflammatory processes and contains myeloperoxidase within its primary (azurophilic) granules and alkaline phosphatase in its secondary (specific) granules? * 0/1 Neutrophils Eosinophils Monocytes Lymphocytes Plasma cells

Neutrophils

Formalin fixes tissue by: * 0/1 Causing a loss of color Forming cross links Forming formic acid Facilitating numerous staining techniques

Forming cross links

The primary purpose of fixation is: * 0/1 Preservation of carbohydrates Coagulation of lipids Removal of tissue fluids Stabilization of proteins

Stabilization of proteins

Microscopic view of a formalin-fixed tissue section demonstrates fine brown to black artifactual pigment. This would have been prevented if the formalin solution had been made: * 0/1 Alkaline Just prior to use Acidic Neutral

Neutral

To prevent the formation of formalin pigment in tissues, formalin should be: * 1/1 Heated Cooled Buffered Acidified

Buffered

A physical agent used in fixation is: * 1/1 Stabilization of proteins Heat Coagulation Alcohol

Heat

For good fixation it is recommended that the tissue be no larger than: * 0/1 2 cm square and 1-2 mm thick 2 cm square and 3-4 mm thick 3 cm square and 1-2 mm thick 3 cm square and 3-4 mm thick

2 cm square and 3-4 mm thick

To make a 10% formalin solution, how many mL of water should be added to 300 mL of 37%-40% formaldehyde solution? * 0/1 1800 2500 2700 3600

2700

Which of the following is NOT a constituent of 10% neutral buffered formalin? * 0/1 Sodium phosphate trihydrate Sodium phosphate dibasic Sodium phosphate monobasic 37%-40% formaldehyde

Sodium phosphate trihydrate

10% formalin contains approximately what percentage of formaldehyde? * 1/1 4 10 37 100

Routine paraffin sections are cut at what micrometer (micron) setting? * 1/1 1 to 3 4 to 6 7 to 9 10 to 15

4 to 6

When liver is cut in the cryostat, the sections obtained are alternately thick and thin, with a distinct "venetian blind" effect. The most probable cause is that the: * 1/1 Anti-roll plate is adjusted wrong Block is too cold Knife is dull Liver is fatty

Knife is dull

Which of the following histological features is unique to cardiac muscle? * 1/1 Cross-striations Peripherally located nuclei Intercalated discs Non-branching fibers

Intercalated discs

The connective tissue cells actively involved in wound healing are: * 1/1 Plasma cells Mast cells Macrophages Fibroblasts

Fibroblasts

The acid used in the Prussian blue reaction is: * 0/1 Acetic acid Hydrochloric acid Nitric acid Sulfuric acid

Hydrochloric acid

The pigment commonly known as "wear and tear pigment" or "brown atrophy" is: * 1/1 Hemofuscin Ceroid Lipofuscin Hemosiderin

Lipofuscin

Antibody molecules can belong to one of five immunoglobulin classes. The antibody class most frequently used in immunofluorescent and immunoenzyme staining is: * 1/1 IgM IgE IgG IgA

IgG

In immunoperoxidase staining of formalin-fixed tissue, enzyme pretreatment of antigens: * 1/1 Enhances background staining Reactivates antigens and enhances primary staining Is needed to demonstrate all antigens Has precise end-points

Reactivates antigens and enhances primary staining

In immunoperoxidase procedures, excess background staining can occur as a result of nonspecific binding of protein to the specimen. This background staining can be reduced by: * 1/1 Using more concentrated primary antibody Using whole serum antibodies Incubating for a shorter time in the primary antibody Applying nonimmune serum from the same animal species as the secondary antibody prior to staining

Applying nonimmune serum from the same animal species as the secondary antibody prior to staining

The volume of fixative should exceed the volume of the tissue by: * 1/1 1 to 2 times 5 to 10 times 10 to 20 times 25 to 50 times

10 to 20 times

To prepare a 10% solution of formalin, which of the following amounts of water should be added to 100 mL of stock formaldehyde: * 1/1 1000 mL 900 mL 450 mL 10 mL

900 mL

Carnoy fluid is prepared with acetic acid, alcohol, and: * 1/1 Chloroform Fromalin Acetone Osmium tetroxide

Chloroform

Most commonly, the paraffin used for embedding tissues is kept at approximately: * 0/1 37C 52C 60C 65C

60C

A good paraffin for routine use is one with a melting point of: * 0/1 50 to 52C 55 to 58C 60 to 62C 63 to 65C

55 to 58C

The most common temperature for floating sections on a flotation bath is approximately: * 1/1 15 to 20C 35 to 40C 45 to 50C 55 to 60C

45 to 50C

During the morning rush, your laboratory manager comes into the laboratory and starts explaining a new policy regarding vacation requests. Word spreads of the change throughout the day, and the message has changed somewhat. Several in the laboratory are upset and complain to the laboratory man- ager. Which of the following actions is the most appropriate way to handle such a situation? * 1/1 Nothing should be changed, it was handled appropriately The manager should have posted the change ont he bulletin board in the break room The manager should have announced the policy on each shift The manager should have discussed and distributed the policy at a laboratory meeting, or several laboratory meetings, so that all employees heard the policy from the manager

The manager should have discussed and distributed the policy at a laboratory meeting, or several laboratory meetings, so that all employees heard the policy from the manager

What is the most important role of the manager in charge? 0/1 Independent decision making Communication Informal discussions None of the above

Communication

You are the lead chemistry MLS. Your laboratory manager has asked you to evaluate two new methods for cholesterol analysis. In your evaluation, you found that method A was very accurate and precise and that method B was not very accurate and precise. However, the laboratory will make more money by investing in method B. Which of the following decisions would exhibit professionalism? * 1/1 Recommend method A to your laboratory manager. It is important that the laboratory produce the most accurate and precise results Recommend method B to your laboratory manager. It is important that the laboratory make as much money as possible State that you are unable to make a recommendation, because no difference in the methods was noted Recommend that you need more time to evaluate both methods

Recommend method A to your laboratory manager. It is important that the laboratory produce the most accurate and precise results

The most important diagnosis and therapeutic management decision tool used to interpret test results is: * 1/1 Statistical analysis Reference intervals Specimen acceptability The age of a patient

Reference intervals

Which of these attributes is the advantage for adding point-of-care testing? * 1/1 Higher test accuracy Lower costs Faster TAT More skilled test personnel

Faster TAT

A benefit of microassays, such as point-of-care methods, include: * 0/1 Increased analytical reliability Reduced sample volume Increased diagnostic specificity Reduced numbers of repeated tests

Reduced sample volume

Flammable and combustible liquids in containers 5 gallons and more should be stored in: * 0/1 A flammable safety cabinet vented to room air A nonexplosion proof refrigerator A fume hood An approved safety can

An approved safety can

Which of the following is the best choice for decontaminating bench tops contaminated by the AIDS virus? * 1/1 Sodium hypochlorite bleach Formalin Quaternary ammonium compound 100% alcohol

Sodium hypochlorite bleach

When processing specimens for mycobacterial testing, what specific engineering control must be used? * 1/1 Horizontal laminar flow hood Barrier protection only Biological safety cabinet Fume hood

Biological safety cabinet

An index of precision is statistically known as the: * 0/1 Median Mean Standard deviation Coefficient of variation

Coefficient of variation

Friction against a rough surface: * 1/1 Laceration Hematoma Contusion Abrasion

Abrasion

All of the following are composition of Bouin’s fluid except: * 1/1 Ethanol Glacial acetic acid Saturated aqueous solution of picric acid Formaldehyde

Ethanol

Miscible with paraffin: * 0/1 Distilled water Ethanol Formalin Xylene

Xylene

The precision of an instrument is validated by: * 0/1 Running the same sample multiple times Performing serial dilutions Processing unknown specimens Monitoring normal and abnormal control

Running the same sample multiple times

To prevent injury, a safe lab work practice is to: * 1/1 Secure long hair and jewelry Store well-wrapped food in the supply refrigerator Wear contact lenses for eye protection Wear comfortable, rubber-bottomed, open-weaved shoes

Secure long hair and jewelry

Safe handling and disposal of laboratory generated infectious waste require: * 0/1 Disinfection of all waste Thorough mixing of infectious and noninfectious waste Separation of infectious and noninfectious waste Incineration of all waste

Separation of infectious and noninfectious waste

Paper or electronic report of lab results must include: * 0/1 The name of the person who collected the specimen The test price A pathologist's signature The name and address of the testing laboratory

The name and address of the testing laboratory

The laboratory manager receives a complaint from the ICU about turnaround times for coagulation tests. The first step in problem solving should be: * 1/1 Gather data on current times by shift Talk to staff about various solutions Perform root cause analysis Draw a process map to send to the ICU explaining why it takes so long

Gather data on current times by shift

A technologist repeatedly misses tubercle bacilli when examining stained smears for acid-fast bacilli. What plan of action should the supervisor first take to correct this problem? * 1/1 Issue a written warning Send the employee to a workshop to improve his/her knowledge Review the diagnostic criteria with the employee and monitor progress Reassign employee to another part of the laboratory

Review the diagnostic criteria with the employee and monitor progress

In quality control, ±2 standard deviations from the mean includes what percentage of the sample population? * 1/1 50% 75% 95% 98%

95%

The following data are calculated on a series of 30 determinations of a serum uric acid control: mean = 5.8 mg/dl, 1 standard deviation = 0.15 mg/dl. If confidence limits are set at ±2 standard deviations, which of these ranges represents the allowable limits for the control? * 0/1 5.65 to 5.95 mg/dl 5.35 to 6.25 mg/dl 5.50 to 6.10 mg/dl 5.70 to 5.90 mg/dl

5.50 to 6.10 mg/dl

Upon completion of a run of cholesterol tests, the technician recognizes that the controls are not within the 2 standard deviations confidence range. What is the appropriate course of action? * 0/1 Report the results without any other action Run a new set of controls Run a new set of controls and repeat specimens Recalibrate instrument and run controls

Run a new set of controls and repeat specimens

Diagnostic specificity is defined as the percentage of individuals: * 0/1 With a given disease who have a positive result by a given test Without a given disease who have a negative result by a given test With a given disease who have a negative result by a given test Without a given disease who have a positive result by a given test

Without a given disease who have a negative result by a given test

Which of the following statements about analytical (examination) errors is true? * 0/1 Analytical laboratory errors are easy for ordering providers to detect Analytical errors almost never happen in a CLIA accredited laboratory Analytical errors are not obvious to providers Analytical errors can be caused by poor patient preparation

Analytical errors are not obvious to providers

other names parasitology

Yves Laure Pimentel · 70問 · 2年前

other names parasitology