Welcome to your MLT- Professional Name: Email: Phone Number: [In the United States, most blood agar plates are prepared with 5% or 10% red blood cells (RBCs) obtained from:] Sheep Horses Humans Dogs None . [A sheep blood agar plate is used as a primary isolation medium when all of the following organisms are to be recovered from a wound specimen except:] β-Hemolytic streptococci and coagulase-positive staphylococci Haemophilus influenzae and Haemophilus parainfluenzae Proteus spp. and Escherichia coli Pseudomonas spp. and Acinetobacter spp. None . [What effect does selecting the wrong gate have on the results when cells are counted by flow cytometry?] No effect Failure to count the desired cell population Falsely elevated results Impossible to determine None . [Which statement about renal calculi is true?] Calcium oxalate and calcium phosphate account for about three-fourths of all stones Uric acid stones can be seen by x-ray Triple phosphate stones are found principally in the ureters Stones are usually comprised of single salts None . [What percentage of red cells must be retained in leukocyte-reduced red cells?] 75% 80% 85% 100% None . [Which crystal appears in urine as a long, thin hexagonal plate, and is linked to ingestion of large amounts of benzoic acid?] Cystine Hippuric acid Oxalic acid Uric acid None . [Inheritance of BRCA1 or BRCA2 mutations increases the risk of breast and ovarian cancer by which mechanism?] Oncogene production Transcription signaling by the mutant protein Deficient tumor suppressor function Chimeric protein production None . [What is the main use of laboratory tests to detect antibodies to islet cells and insulin in cases of insulin-dependent diabetes mellitus (IDDM)?] To regulate levels of injected insulin To diagnose IDDM To rule out the presence of other autoimmune diseases To screen susceptible individuals prior to destruction of β cells None . [Sexual harassment is a form of discrimination and therefore is prohibited by the:] Occupational Safety and Health Administration (OSHA) Civil Rights Act of 1964 (Title VII) Right to Privacy Act of 1974 Department of Health and Human Services None . [Which of the following circumstances is considered a form of sexual harassment?] Unwelcome sexual advances by a supervisor Requests for favors of a sexual nature from a fellow laboratory employee Physical conduct of a sexual nature from an employee working in another department All of these options None . [Which statement about sample collection for routine urinalysis is true?] Preservative tablets should be used for collecting random urine specimens Containers may be washed and reused if rinsed in deionized H2O Samples may be stored at room temperature for up to 2 hours First morning voided samples are not acceptable when renal disease is suspected None . [What reagents are used in the PT test?] Thromboplastin and sodium chloride Thromboplastin and potassium chloride Thromboplastin and calcium Actin and calcium chloride None . [When drawing a blood alcohol specimen, it is acceptable to clean the arm with:] benzalkonium chloride. isopropyl alcohol. methanol prep. tincture of iodine. None . [A positive glucose oxidase test and a negative test for reducing sugars indicates:] True glycosuria False-positive reagent strip test False-negative reducing test caused by ascorbate Galactosuria None . [Which substance is used to generate the light signal in electrochemiluminescence?] Acridinium Luminol Dioxetane phosphate Ruthenium None . [Which condition is associated with the lowest percent saturation of transferrin?] Hemochromatosis Anemia of chronic infection Iron deficiency anemia Noniron deficiency anemia None . [Red cells from a recently transfused patient were DAT positive when tested with anti-IgG. Screen cells and a panel performed on a patient’s serum showed very weak reactions with inconclusive results. What procedure could help to identify the antibody?] Elution followed by a panel on the eluate Adsorption followed by a panel on the adsorbed serum Enzyme panel Antigen typing the patient’s red cells None . [Which assay is used to confirm difficult cases of hypothyroidism?] Free T3 assay Free thyroxine index Thyrotropin-releasing hormone (TRH) stimulation test TBG assay None . [Which of the following distinguishes A1 from A2 blood groups?] A2 antigen will not react with anti-A, A1 will react strongly (4+) An A2 person may form anti-A1; an A1 person will not form anti-A1 An A1 person may form anti-A2, an A2 person will not form anti-A1 A2 antigen will not react with anti-A from a nonimmunized donor; A1 will react with any anti-A None . [SITUATION: A lab wishes to evaluate its specimen processing operations to improve test turnaround time for cardiac markers using a LEAN process. To accomplish this, the lab manager measures the time it takes for specimens to be collected and transported to the lab, entered into the LIS and instrument data link, centrifuged, and placed on the automated track. This process is called:] Establishing pull Creating a flow diagram Mapping the value stream Process analysis None . [A transplant patient is suspected of having invasive aspergillosis on the basis of clinical and radiological findings. Which specimen is best for the initial identification of aspergillosis by soluble antigen testing?] Blood culture Lung biopsy Serum or urine Sputum None . [Which of the following tests is collected in a trace element–free tube?] ABGs Aluminum BUN Hemoglobin None . [Should an O-negative mother receive RhIg if a positive DAT on the newborn is caused by immune anti-A?] No, the mother is not a candidate for RhIg because of the positive DAT Yes, if the baby’s type is Rh negative Yes, if the baby’s type is Rh positive No, the baby’s problem is unrelated to Rh blood group antibodies None . [In what condition may urinary ketone tests underestimate ketosis?] Acidosis Hemolytic anemia Renal failure Excessive use of vitamin C None . [Which of the following is often associated with CML but not with AML?] Infections WBCs greater than 20.0 × 109/L Hemorrhage Splenomegaly None . [Which type of filter is best for measuring stray light?] Wratten Didymium Sharp cutoff Neutral density None . [Renal tubular epithelial cells are shed into the urine in largest numbers in which condition?] Malignant renal disease Acute glomerulonephritis Nephrotic syndrome Cytomegalovirus (CMV) infection of the kidney None . [When measuring calcium by atomic absorption spectrophotometry, which is required?] An organic extraction reagent to deconjugate calcium from protein An internal standard A magnesium chelator Lanthanum oxide to chelate phosphates None . [When performing a sweat chloride collection, which of the following steps will result in analytical error?] Using unweighed gauze soaked in pilocarpine nitrate on the inner surface of the forearm to stimulate sweating Collecting more than 75 mg of sweat in 30 minutes Leaving the preweighed gauze on the inside of the arm exposed to air during collection Rinsing the collected sweat from the gauze pad using chloride titrating solution None . [Neutrophil phagocytosis and particle ingestion are associated with an increase in oxygen utilization referred to as respiratory burst. What are the two most important products of this biochemical reaction?] Hydrogen peroxide and superoxide anion Lactoferrin and NADPH oxidase Cytochrome b and collagenase Alkaline phosphatase and ascorbic acid None . Time's up
