New Quiz 26 Jan Welcome to your MLT- Professional Name: Email: Phone Number: [You are in the process of collecting a specimen by venipuncture. You hear a hissing sound, there is a spurt of blood into the tube, and blood flow stops. What has most likely happened? ] Reflux of tube contents. The needle went too deep. The vein has collapsed. Tube vacuum escaped. None . [Which Hgb is a β-o chain hybrid and migrates to the same position as Hgb S at pH 8.6?] Hgb CHarlem HgbLepore Hgb GPhiladelphia Hgb DPunjab None . [Which blood type may be transfused to an AB-positive baby who has HDN caused by anti-D?] AB negative, CMV negative, Hgb S negative; irradiated or O negative, CMV negative, Hgb S negative AB positive, CMV negative; irradiated or O positive, CMV negative AB negative only O negative only None . [Which statement is correct regarding sample storage for the prothrombin time test?] Stable for 24 hours if the sample is capped Stable for 24 hours if the sample is refrigerated at 4°C Stable for 4 hours if the sample is stored at 4°C Should be run within 8 hours None . [An Rh phenotyping shows the following results: Anti-D Anti-C Anti-E Anti-c Anti-e 4+ 2+ 0 0 3+ What is the most likely Rh genotype?] R1r´ R0r R1R1 R1r None . [Which test best correlates with the severity of HDN?] Rh antibody titer of the mother Lecithin/sphingomyelin (L/S) ratio Amniotic fluid bilirubin Urinary estradiol None . [A blood agar plate inoculated with sputum from a patient with diabetes mellitus grew very few bacterial flora and a predominance of yeast. Given the following results, what is the most likely identification of the yeast isolate? CORNMEAL TWEEN 80 AGAR Germ tube = Neg Pseudohyphae = + Arthroconidia = Neg Blastoconidia = + (arranged along pseudohyphae) Chlamydospores = Neg] Candida tropicalis Candida kefyr (pseudotropicalis) Trichosporon cutaneum Geotrichum candidum None . [Which is the correct sequence of events after blood vessel injury?] Fibrinolysis, platelet adhesion, vasoconstriction Platelet aggregation, vasoconstriction, fibrin clot formation Vasoconstriction, platelet aggregation, fibrin clot formation Vasodilation, platelet adhesion, fibrin clot formation None . [Which whole-blood level is suggestive of excessive exposure to lead in children but not adults?] 4 μ g/dL 14 μ g/dL 28 μ g/dL 32 μ g/dL None . [Interpret the following results for EBV infection: IgG and IgM antibodies to viral capsid antigen (VCA) are positive.] Infection in the past Infection with a mutual enhancer virus such as HIV Current infection Impossible to interpret; need more information None . [Which statement is true regarding the volume distribution (Vd) of a drug?] Vd is equal to the peak blood concentration divided by the dose given Vd is the theoretical volume in liters into which the drug distributes The higher the Vd, the lower the dose needed to reach the desired blood level of drug The Vd is the principal determinant of the dosing interval None . [Which of the following findings is characteristic of all forms of clinical hypoglycemia?] A fasting blood glucose value below 55 mg/dL High fasting insulin levels Neuroglycopenic symptoms at the time of low blood sugar Decreased serum C peptide None . [A newborn is to be tested for a vertically transmitted HIV infection. Which of the following tests is most useful?] HIV PCR CD4 count Rapid HIV antibody test HIV IgM antibody test None . [Which of the following abnormal types of Hgb migrates to the same position as Hgb S on agarose or cellulose acetate at pH 8.6?] Hgb C Hgb DPunjab Hgb OArab Hgb E None . [Culture on MTM media of a vaginal swab produced several colonies of gram-negative diplococci that were catalase and oxidase positive and Superoxol negative. Given the following carbohydrate reactions, select the most likely identification. Glucose = + Sucrose = Neg Lactose = + Maltose = + Fructose = Neg] Neisseria gonorrhoeae Neisseria sicca Neisseria flavescens Neisseria lactamica None . [What is the PCO2 if the dCO2 is 1.8 mmol/L?] 24 mm Hg 35 mm Hg 60 mm Hg 72 mm Hg None . [Which of the following tests best differentiates Shigella species from E. coli?] Hydrogen sulfide, VP, citrate, and urease Lactose, indole, ONPG, and motility Hydrogen sulfide, MR, citrate, and urease Gas, citrate, and VP None . [Which is the correct sequence of events after blood vessel injury?] Fibrinolysis, platelet adhesion, vasoconstriction Platelet aggregation, vasoconstriction, fibrin clot formation Vasoconstriction, platelet aggregation, fibrin clot formation Vasodilation, platelet adhesion, fibrin clot formation None . [Which of the following reactions are often positive in ALL but are negative in AML?] Terminal deoxynucleotidyl transferase and PAS Chloroacetate esterase and nonspecific esterase Sudan Black B and peroxidase New methylene blue and acid phosphatase None . [In humans, which component of a gene is translated into a protein?] Intron Exon Promoter TATA box None . [In this type of inheritance, the father carries the trait on his X chromosome. He has no sons with the trait because he passed his Y chromosome to his sons; however, all his daughters will express the trait.] Autosomal dominant Autosomal recessive X-linked dominant X-linked recessive None . [Which test is the most reliable for the detection of Mycoplasma pneumonia in serum and for the confirmation of diagnosis?] EIA testing and direct antigen testing Cold agglutinin testing using Group O RBCs Culture on SP4 glucose broth with arginine Complement fixation None . [In myelofibrosis, the characteristic abnormal red blood cell morphology is that of:] Target cells Schistocytes Teardrop cells Ovalocytes None . [Which of the following is considered a normal hemoglobin?] Carboxyhemoglobin Methemoglobin Sulfhemoglobin Deoxyhemoglobin None . [Which of the following semen analysis results is abnormal?] Volume 1.0 mL Liquefaction 40 minutes at room temperature pH 7.6 Motility 50% progressive movement None . [What disease is indicated by a high titer of anti-Sm (anti-Smith) antibody?] Mixed connective tissue disease (MCTD) RA SLE Scleroderma None . [Which genotype(s) will give rise to the Bombay phenotype?] HH only HH and Hh Hh and hh hh only None . [Testing reveals a weak D that reacts 1+ after indirect antiglobulin testing (IAT). How is this result classified?] Rh-positive Rh-negative, Du positive Rh-negative Rh-positive, Du positive None . [Which region of the immunoglobulin molecule can bind antigen?] Fab Fc CL CH None . [Which formula correctly describes the relationship between absorbance and %T ?] A = 2 – log %T A = log 1/T A = –log T All of these options None . Time's up
