When using an electronic cell counter, which of the following results can occur in the presence of a cold agglutination? a) increased MCV and decreased
... [Show More] RBC b) increased MCV and normal RBC c) decreased MCV and increased MCHC d) decreased MCV and RBC - Answer- a) increased MCV and decreased RBC
Cerebrospinal fluid for glucose assay should be: a) refrigerated b) analyzed immediately c) heated to 56 degree C d) stored at room temp after centrifugation - Answer- b) analyzed immediately
The major crossmatch will detect: a) group A patient mistyped as group O b) unexpected red cell antibody in the donor unit c) Rh-neg donor unit mislabeled as Rh-Pos d) recipient antibody directly against antigens on the donor red cells - Answer- d) recipient antibody directly against antigens on the donor red cells
The anion gap is useful for quality control of laboratory reselts for a) amino acids and proteins b) blood gas anaylses c) sodium, potassium, chloride and total C02 d) calcium, phosphorus and magnesium - Answer- c) sodium, potassium, chloride and total C02
A common cause of respiratory alkalosis is a) vomitting b) starvation c) asthma d) hyperventilation - Answer- d) hyperventilation
Blood is diluted 1:200, and a platelet count is performed. 180 platelets were counted in the center square millimeter on one side of the hemacytometer and 186 on the other side/ The total platelet count is: a) 146 x 10³/μL (146 x 10⁹/L) b)183 x 10³/μL (183 x 10⁹/L) c)366 x 10³/μL (3666 x 10⁹/L) d)732 x 10³/μL (732 x 10⁹/L) - Answer- c)366 x 10³/μL (3666 x 10⁹/L)
When staining acid-fast bacilli with Truant auramine-rhodamine stain, potassium permanganate is used a a) decolorizing agent b) quenching agent c) mordant d) dye - Answer- b) quenching agent
A first morning sputum is received for culture of acid-fast bacilli. It is digested and concentrated by the N-acetyl-L-cysteine alkali method. Two Sabouraud dextrose slants are incubated in the dark at 35ºC with 5%-10% CO2. The smear reveal acid-fast bacilli, but the slants show no growth after 8 weeks. The explanation is: a) improper media used b) incorrect concentration procedure used c) improper specimen submitted d) exposure to CO2 prevents growth - Answer- a) improper media used
MacConkey media for screening suspected cases of hemorrhagic E. coli O157:H7 must contain: a) indole b) citrate c) sorbitol d) lactose - Answer- c) sorbitol
A patient with a B-cell deficiency will most likely exhibit: a) decreased phagocytosis b) increased bacterial infections c) decreased complement levels d) increased complement levels - Answer- b) increased bacterial infections
Communication is enhanced by: a) a planned strategy that includes listening skills and ensuring an understanding with questions b) relying on e-mail, memos and voice mail to communicate new information c) formal, hierachical patterns instead of informal networking patterns d) assumptions if there are questions about the intent of the message - Answer- a) a planned strategy that includes listening skills and ensuring an understanding with questions
IgM antibodies are frequently hemolytic because of: a)the dimeric structure b) the molecule's 5 antigen binding sites c) their sedimentation coefficient of 7-15 S d) their coefficient ability to fix complement - Answer- b) the molecule's 5 antigen binding sites
A community hospital microbiology laboratory is processing significant numbers of stool cultures because of an outbreak of diarrhea following heavy rains and flooding in the county. A media that should be incorporated in the plating protocol is: a) colistin nalidixic acid for listeria b) MacConckey agar with sorbitol for Campylobacter c) mannitol salt agar for Enterococcus speices d) thiosulfate citrate bile salts sucrose for Vibrio species - Answer- d) thiosulfate citrate bile salts sucrose for Vibrio species
80 grams of NaOH (MW=40) are how many moles? a) 1 b) 2 c) 3 d) 4 - Answer- b) 2
An electrode has a silver/silver chloride anode and a platinum wire cathode. It is suspended in KCl solution and separated fro the blood to be analyzed by a selectively permeable membrane. Such an electrode is used to measure which of the following? a) pH b) PCO2 c) PO2 d) HCO2 - Answer- c) PO2
The organism most commonly associated with neonatal purulent mentingitis is: a) Neisseria meningitidis b) Streptococcus pneumoniae c) group B streptococci d) Haemophilus influenzae - Answer- c) group B streptococci
The volume of urine excreted in a 24-hour period by an adult patient was 300mL. This condition would be termed: a) anuria b) oliguria c)polyuria d) dysuria - Answer- b) oliguria
Amniotic fluid is tested for the concentration of lamellar bodies. This test determines: a) fetal lung maturity (FLM) b) hemolytic disease of the newborn (HDN) c) alpha-fetoprotein (AFP) d) trisomy 21 - Answer- a) fetal lung maturity
The purpose of testing with anti-A,B is to detect: a) anti-A¹ b) anti-A² c) subgroups of A d) subgroups of B - Answer- c) subgroups of A
The most important buffer pair in plasma is the a) phosphate/biphosphate pair b) hemoglobin/imidazole pair c) bicarbonate/carbonic acid pair d) sulfate/bisulfate pair - Answer- c) bicarbonate/carbonic acid pair
Evidence of active red cell regeneration may be indicated on a blood smear by: a) basophilic stippling, nucleated RBC and polychromasia b) hypochromia, macrocytes and nucleated RBC c) hypochromia, basophilic stippling and nucleated RBC d) Howell-Jolly bodies, Cabot rings and basophilic stippling - Answer- a) basophilic stippling, nucleated RBC and polychromasia
Which of the following is most closely associated with chronic myelogenous leukemia? a) ringed sideroblasts b) disseminated intravascular coagulation c) micromegakaryocytes d) Philadelphia chromosome - Answer- d) Philadelphia chromosome
All stages of neutrophils are most likely to be seen in the peripheral blood of a patient with: - Answer- (chronic granulocytic leukemia) CML
to be analyzed by gas liquid chromatography a compound must - Answer- be volatile or made volatile
Rheumatoid factors are immunoglobulins with specificity for allotypic determinants located on the: - Answer- Fc fragment of IgG.
Substances that are ANTIGENIC ONLY when coupled to a protein carrier. - Answer- haptens
A technologist splashed a corrosive chemical in his/her eyes. To prevent permanent injury, the first action should be to: - Answer- use the eyewash station to flush eyes with water for 15 minutes
Which of the following immunoglobulins is the most efficient at agglutination? - Answer- IgM
Use of "standard" (universal) precautions minimizes exposure to: - Answer- bloodborne pathogens
Which of the following is true about direct ion selective electrodes for electrolytes? - Answer- whole blood specimens are acceptable
Leukocyte reduced red blood cells are ordered for a newly diagnosed bone marrow candidate . Which way is the best way to prepare this product. - Answer- Transfuse through a log3 leukocyte removing filter
the steam autoclave method of sterilization - Answer- uses 15 lbs of pressure for 15 minutes
Factors that contribute to a PCO2 electrode requiring 60-120 seconds to reach equilibrium include the: - Answer- diffusion characteristics of the membrane
Of the following, the disease most closely associated with pale blue inclusions in granulocytes and giant platelets is: - Answer- May Hegglin
Which of the follwing factors would make an organism appear to be more resistant on a disk diffusion sustibility test? - Answer- too many organisms in the innoculum
In spectrophotometry, the device that allows for a narrow band of wavelengths is the: - Answer- Monochromator.
Leukocyte-poor red blood cells would most likely be indicated for patients with a history of - Answer- febrile transfusion reactions.
In synovial fluid, the most characteristic microscopic finding in pseudogout is - Answer- calcium pyrophosphate dihydrate crystals
An index of precision is statistically known as the: - Answer- coefficient of variation
AHG coombs control cells : - Answer- are coated with IgG antobody
Which laboratory technique is most frequently used to diagnose and follow the course of therapy of a patient with secondary syphilis - Answer- flocculation
The disease most often associated with elevations of lactate dehydrogenase isoenzymes 4 and 5 on electrophoresis is: - Answer- liver disease
The most appropriate screening test for hemoglobin F is: - Answer- Kleihauer-Betke
An enzyme deficiency associated with a moderate to severe hemolytic anemia after the patient is exposed to certain drugs and that is characterized by red cell inclusions formed by denatured hemoglobin is: - Answer- G6P DH deficiency
which one of the following gram-negative bacilli ferments glucose - Answer- Yersinia enterocolitica
Photochromogens produce pigment when: - Answer- exposed to light for 1 hour
For a patient who has suffered an acute hemolytic transfusion reaction, the primary treatment should be: - Answer- Reverse hypotension and minimize renal damage
Which of the following statements most correctly describes the utility of clinical laboratory assays for tumor markers? - Answer- tumor markers are useful in tracking the efficacy of treatment
Which of the following is the most reliable test to differentiate Neisseria lactamica from Neisseria meningidis? - Answer- lactose degradation
Which of the following may be used a a positive quality control organism for the bile esculin test. - Answer- Enterococcus faecalis
The major features by which molds are routinely identified are: - Answer- Macroscopic characteristice and microscopic morphology
hemorrhage in polycythemia vera is the result of - Answer- abnormal platelet funtion
Vibrio parahemolyticus can be isolated best from feces on: - Answer- thiosulfate citrate bile salts (TCBS) agar
Antibodies composed of IgG immunoglobulin: - Answer- can cross the placenta from mother to fetus
Antibody idiotype is dictated by the: - Answer- variable regions of the heavy and light chains
Lithium therapy is widely used on the treatment of: - Answer- bipolar affective (manic-depressive) disorder
after receiving appropriate training, the first step in using a fire extinguisher is to: - Answer- pull the pin
Tumor markers found in the circulation are most frequently measured by - Answer- immunoassays
your friend calls and asks you to access his test results. Which of the following does this violate - Answer- HIPAA
Which of the following casts most frequently appears to have a brittle consistency? - Answer- waxy
Which of the following antigens is most likely to be involved in hemolytic disease of the newborn? - Answer- Kell
A Patient with a coagulopathy was transfused with FP24 (plasma frozen within 24 hours of collection) After infusion of 15mL, the patient experienced hypotension, shock, chest pain and difficulty in breathing. The most likely cause of the reaction is: - Answer- anti-IgA
False-positive results can occur for fecal occult blood due to the ingestion of: - Answer- horseradish
A consistently and repeatedly negative IFA-ANA is: - Answer- strong evidence against5 untreated SLE
What kind of antigen-antibody reaction would be expected if soluble antige [Show Less]