HEMACHAP-REVIEW-RODAKS-6th-ed. Flashcards
- What procedure is NOT employed to validate a new assay?
a. Comparison of assay results to a
reference method
b. Test for assay precision
c. Test for assay linearity
d. Moving average algorithm
d. Moving average algorithm
- You validate a new assay using linear regression to compare assay calibrator results with the distributor’s published cali- brator results. The slope is 0.99 and
the y intercept is 110%. What type of error is present?
a. No error
b. Random error
c. Constant systematic error
d. Proportional systematic error
c. Constant systematic error
- Which is a statistical test that compares means?
a. Bland-Altman
b. Student t-test
c. ANOVA
d. Pearson
b. Student t-test
- The acceptable hemoglobin control value range is 13 6 0.4 g/dL. The control is assayed five times and produces the
following five results: 12.0 g/dL 12.3 g/dL 12.0 g/dL 12.2 g/dL 12.1 g/dL These results are:
a. Accurate but not precise
b. Precise but not accurate
c. Both accurate and precise
d. Neither accurate nor precise
b. Precise but not accurate
- A WBC count control has a mean value of
6000/mL and an SD of 300/mL. What is the 95.5% confidence interval?
a. 3000 to 9000/mL
b. 5400 to 6600/mL
c. 5500 to 6500/mL
d. 5700 to 6300/mL
b. 5400 to 6600/mL
- The ability of an assay to distinguish the targeted analyte from interfering substances within the specimen matrix is called:
a. Analytical specificity
b. Analytical sensitivity
c. Clinical specificity
d. Clinical sensitivity
a. Analytical specificity
- A laboratory scientist measures prothrombin time for plasma aliquots from 15 healthy men and 15 healthy women. She computes the mean and 95.5% confidence interval and notes that they duplicate the manufacturer’s statistics within 5%. This procedure is known as:
a. Setting the RI
b. Confirming linearity
c. Determining the therapeutic range
d. Establishing the RI by transference
d. Establishing the RI by transference
- You perform a clinical efficacy test and get the following results:
What is the number of false-negative results?
a. 45
b. 40
c. 10
d. 5
d. 5
- The laboratory purchases reagents from a manufacturer and develops an assay using a protocol published in a vol- ume of the Methods in Molecular Biology series. How would the FDA classify this assay?
a. Cleared
b. Research use only
c. Analyte-specific reagent
d. Laboratory-developed test
d. Laboratory-developed test
- What agency provides external quality
assurance (proficiency) surveys and laboratory accreditation?
a. Clinical Laboratory Improvement Advisory Committee (CLIAC)
b. Centers for Medicare and Medicaid
Services (CMS)
c. College of American Pathologists (CAP)
d. The Joint Commission
c. College of American Pathologists (CAP)
- You purchase a preserved whole blood
specimen from a distributor who provides the mean values for several com- plete blood count analytes. What is this specimen called?
a. Normal specimen
b. Calibrator
c. Control
d. Blank
c. Control
2.The glycocalyx is composed of membrane:
a. Phospholipids and cholesterol
b. Glycoproteins and glycolipids
c. Transmembrane and cytoskeletal proteins
d. Rough and smooth endoplasmic reticulum
b. Glycoproteins and glycolipids
- What agency provides continuing medical laboratory education?
a. Clinical Laboratory Improvement
Advisory Committee (CLIAC)
b. American Society for Clinical
Laboratory Science (ASCLS)
c. Centers for Medicare and Medicaid
Services (CMS)
d. College of American Pathologists (CAP)
b. American Society for Clinical
Laboratory Science (ASCLS)
- Regular review of blood specimen collection quality is an example of:
a. Postanalytical quality assurance
b. Preanalytical quality assurance
c. Analytical quality control
d. External quality assurance
b. Preanalytical quality assurance
- Review of laboratory report integrity is an example of:
a. Postanalytical quality assurance
b. Preanalytical quality assurance
c. Analytical quality control
d. External quality assurance
a. Postanalytical quality assurance
- When performing a receiver operating curve analysis, what parameter assesses the overall efficacy of an assay?
a. Area under the curve
b. Performance limit (threshold)
c. Positive predictive value
d. Negative predictive value
a. Area under the curve
- You require your laboratory staff to annually perform manual lupus anticoagulant profiles on a set
of plasmas with known values. This exercise is known as:
a. Assay validation
b. Proficiency testing
c. External quality assessment
d. Pre-pre analytical variable assay
b. Proficiency testing
- The organelle involved in packaging and
trafficking of cellular products is the:
a. Nucleus
b. Golgi apparatus
c. Mitochondria
d. Rough endoplasmic reticulum
b. Golgi apparatus
- The “control center” of the cell is the:
a. Nucleus
b. Cytoplasm
c. Membrane
d. Microtubular system
a. Nucleus
- The nucleus is composed largely of:
a. RNA
b. DNA
c. Ribosomes
d. Glycoproteins
b. DNA
- The site of protein synthesis is the:
a. Nucleus
b. Mitochondria
c. Ribosomes
d. Golgi apparatus
c. Ribosomes
- The shape of a cell is maintained by which of the following?
a. Microtubules
b. Spindle fibers
c. Ribosomes
d. Centrioles
a. Microtubules
- Functions of the cell membrane include all of the following except:
a. Regulation of molecules entering or
leaving the cell
b. Receptor recognition of extracellular
signals
c. Maintenance of electrochemical
gradients
d. Lipid production and oxidation
d. Lipid production and oxidation
- The energy source for cells is the:
a. Golgi apparatus
b. Endoplasmic reticulum
c. Nucleolus
d. Mitochondrion
d. Mitochondrion
- Ribosomes are synthesized by the:
a. Endoplasmic reticulum
b. Mitochondrion
c. Nucleolus
d. Golgi apparatus
c. Nucleolus
- The process of formation and development of blood cells is termed:
a. Hematopoiesis
b. Hematemesis
c. Hematocytometry
d. Hematorrhea
a. Hematopoiesis
- Euchromatin functions as the:
a. Site of microtubule production
b. Transcriptionally active DNA
c. Support structure for nucleoli
d. Attachment site for centrioles
b. Transcriptionally active DNA
- The cell cycle is regulated by:
a. Cyclins and cyclin-dependent kinases
b. Proto Oncogenes
c. Apoptosis
d. Growth factors
a. Cyclins and cyclin-dependent kinases
- The transition from the G1 to S stage of the cell cycle is regulated by:
a. Cyclin B/CDK1 complex
b. Cyclin A/CDK2 complex
c. Cyclin D1
d. Cyclin E/CDK2 complex
d. Cyclin E/CDK2 complex
- Which one of the following statements is FALSE concern- ing cellular signal transduction?
a. Membrane-permeable ligands can
directly bind to intracellular receptors.
b. A transmembrane receptor can
transmit a signal into the cell through its
intracellular domain when ligand binds
its extracellular domain.
c. The binding of membrane receptors
to fixed ligands such as extracellular
matrix can transmit intracellular signals.
d. The binding of soluble ligands to
membrane receptors is not able to
induce changes in gene expression.
d. The binding of soluble ligands to
membrane receptors is not able to
induce changes in gene expression.
- Apoptosis is morphologically identified by:
a. Cellular swelling
b. Nuclear condensation
c. Rupture of the cytoplasm
d. Rupture of the nucleus
b. Nuclear condensation
- Regulation of the hematopoietic
microenvironment is provided by the:
a. Stromal cells and growth factors
b. Hematopoietic stem cells
c. Liver and spleen
d. Cyclins and caspases
a. Stromal cells and growth factors
- During the second trimester of fetal development, the primary site of blood cell production is the:
a. Bone marrow
b. Spleen
c. Lymph nodes
d. Liver
d. Liver
- Which one of the following organs is responsible for the maturation of T lymphocytes and regulation of their expression of CD4 and CD8?
a. Spleen
b. Liver
c. Thymus
d. Bone marrow
c. Thymus
- The best source of active bone marrow from a 20 year old would be:
a. Iliac crest
b. Femur
c. Distal radius
d. Tibia
a. Iliac crest
- Which organ is the site of sequestration of platelets?
a. Liver
b. Thymus
c. Spleen
d. Bone marrow
c. Spleen
- Physiologic programmed cell death is termed:
a. Angiogenesis
b. Apoptosis
c. Aneurysm
d. Apohematics
b. Apoptosis
- Which one of the following cells is a product of the common lymphoid progenitor?
a. Megakaryocyte
b. T lymphocyte
c. Erythrocyte
d. Granulocyte
b. T lymphocyte
- Which one of the following morphologic
changes occurs during normal blood cell
maturation?
a. Increase in cell diameter
b. Development of cytoplasm basophilia
c. Condensation of nuclear chromatin
d. Appearance of nucleoli
c. Condensation of nuclear chromatin
- What growth factor is produced in the kidneys and is used to treat anemia associated with kidney disease?
a. EPO
b. TPO
c. G-CSF
d. KIT ligand
a. EPO