ASCP ASCP-MLT Online Practice Questions and Exam Preparation

ASCP ASCP-MLT Online Questions & Answers

• Question 371:

  Only non-self antigens can be immunogenic. Self antigens are normally recognized by the immune system as part of the host, so an immune response does not normally occur. Non- self antigens are immunogenic since they have the potential to cause an immune response.

  For a substance to be immunogenic it must be:

  A. A linear molecule
  B. A lipid
  C. Less than 5,000 molecular weight
  D. Recognized as non-self
  E. A haptene
  D. Recognized as non-self

• Question 372:

  Platelet neutralization tests are one of the confirmatory tests that can be used to determine if a patient has a circulating lupus antibody, or lupus anticoagulant. The principle in this test involved the use of a freeze-thawed platelet suspension that, when mixed with the patient plasma, will neutralize the anti-phospholipid antibodies (lupus anticoagulant) present and allow for a corrected aPTT result upon re-testing. A patient has a history of repeated spontaneous abortion. Coagulation studies reveal an elevated APTT, normal PT, normal platelet function, and normal clotting time. Schistocytes were seen on the peripheral blood smear.

  Which test should be performed to determine if the patient has lupus anticoagulant?

  A. Factor VIII assay
  B. mixing studies with factor-deficient plasma
  C. antinuclear antibody test
  D. platelet neutralization test
  D. platelet neutralization test

• Question 373:

  Animals serve as a reservoir of infection" is the correct answer because Shigella only infects humans while Salmonella is found in many animals. Both have diarrhea as the major symptom. Endotoxin is produced by all gram negative bacteria

  and exotoxin is only produced by Shigella.

  A major difference between Salmonella enterica and Shigella infections is that only in salmonellosis can:

  A. animals serve as a reservoir of infection
  B. diarrhea become the major symptom
  C. endotoxin play a role in disease process
  D. exotoxin produce profuse watery stools
  A. animals serve as a reservoir of infection

• Question 374:

  To make a 1 : 10 dilution, 270 μL of diluent should be added to 30 μL of sample, .

  A spinal fluid that is slightly hazy is briefly examined microscopically. The technologist performing the count decides to make a 1:10 dilution using 30 μL of sample. What volume of diluent should be used?

  A. 70 μL
  B. 270 μL
  C. 300 μL
  B. 270 μL

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  Explanation/Reference:

• Question 375:

  A normal hemoglobin molecule consists of a tetramer, of four heme and four globin chains, with a molecular weight of 64,500 daltons. Each of the four units can bind a molecule of oxygen for transport to the body's tissues. In the image shown below, there are four monomers (2 red globin chains and 2 blue globin chains) which form the entire hemoglobin tetramer structure. The green portions represent the 4 heme groups.

  A normal hemoglobin molecule is comprised of the following:

  

  A. Ferrous iron and four globin chains
  B. Four heme and four globin chains
  C. Four heme and one globin chains
  D. One heme and four globin chains
  B. Four heme and four globin chains

• Question 376:

  The Needlestick Safety and Prevention Act requires employers to:

  A. test MLTs annually for hepatitis B and HIV
  B. involve MLTs in the selection of safety devices
  C. provide MLTs with plastic capillary tubes
  D. allow MLTs to work flexible schedules
  B. involve MLTs in the selection of safety devices

• Question 377:

  Whole blood glucose values are lower than plasma glucose values. For this reason, point- of-care whole blood glucose meters are programmed to correct the value before presenting the result; therefore, the whole blood glucose meter result correlates to serum or plasma results.

  Whole blood glucose values are ____________ plasma glucose values.

  A. Greater than
  B. Lower than
  C. Equal to
  B. Lower than

• Question 378:

  A young man is experiencing difficult breathing after fainting. The physician orders a blood gas analysis which shows the following results: pH = 7.25 pCO2 = 62 mmHg pO2 = 70 mmHg HCO3 = 23 mEq/L Which condition is most likely afflicting this patient?

  A. metabolic alkalosis
  B. metabolic acidosis
  C. respiratory alkalosis
  D. respiratory acidosis
  D. respiratory acidosis

• Question 379:

  Which EBV markers would be MOST likely positive for an individual who had infectious mononucleosis 9 years ago?

  A. All would still be positive
  B. Anti-VCA (IgM) and heterophile
  C. Anti-VCA (IgG) and anti-EBNA
  D. None of the markers would be positive after 9 years
  C. Anti-VCA (IgG) and anti-EBNA

• Question 380:

  An ultrarapid metabolizer (UM) would require a higher dose of a drug than an EM (a person with normal enzyme activity) since the UM eliminates the drug more quickly.

  A CYP2D6 ultrarapid metabolizer (UM) would require ___________ dose of an active drug (non-prodrug) that is metabolized by CYP2D6 than a CYP2D6 extensive metabolizer (EM).

  A. a higher
  B. a lower
  C. the same
  A. a higher