ASCP ASCP-MLT Online Practice Questions and Exam Preparation

ASCP ASCP-MLT Online Questions & Answers

• Question 51:

  Osteoblasts are generally seen in clusters while plasma cells are often more diffusely distributed. Osteoblasts have delicate cytoplasm, whereas plasma cells have dense basophilic cytoplasm with a perinuclear halo.

  Hematology

  The large cell shown in the illustration to the right is occasionally seen in the bone marrow and can be mistaken for a plasma cell - what is this cell called:

  

  A. Myeloblast
  B. Osteoblast
  C. Stem cell
  D. Megakaryoblast
  B. Osteoblast

• Question 52:

  The risk of HbS polymerization is enhanced by a low (acid) pH, a state of dehydration, and increased levels of 2,3-DPG. Increased temperature (above 37°C) also adds to the risk.

  Hematology

  Which group of conditions INCREASES the risk of HbS polymerization?

  A. Acid pH, dehydration, decreased level of 2,3-DPG
  B. Alkaline pH, dehydration, increased level of 2,3-DPG
  C. Acid pH,dehydration, increased level of 2,3-DPG
  D. Alkaline pH,dehydration, decreased level of 2,3-DPG
  C. Acid pH,dehydration, increased level of 2,3-DPG

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  Explanation/Reference:

• Question 53:

  Listeria monocytogenes is the correct answer. The motility agar is showing motility at the top of the tube, but not deeper; typical of this catalase-positive, gram positive bacillus. Streptococcus agalactiae would be catalase negative and a coccus. Erysipelothrix rhusiopathiae would be H2S-positive and catalase negative. Escherichia coli is a gram negative bacillus.

  

  This Gram-positive bacillus grew as a diffusely beta-hemolytic colony from a newborn. It was catalase positive and had tumbling motility on a hanging drop preparation. This is how it appeared on triple sugar iron agar and motility medium. What is the most likely diagnosis?

  A. Listeria monocytogenes
  B. Streptococcus agalactiae
  C. Erysipelothrix rhusiopathiae
  D. Escherichia coli
  A. Listeria monocytogenes

• Question 54:

  Patient's with diseases such as congential hemolytic anemias and aplastic anemias require frequent transfusions. Each unit of red cells contains 225 mg of iron, which puts these patients at risk for iron overload. Blood Bank

  Patients with diseases that require chronic transfusions are at risk for iron overload.

  A. true
  B. false
  A. true

• Question 55:

  The organisms in this image are demonstrating a gram-variable phenomenon. For the most part, the organisms are staining primarily gram-negative, however, on the tips of some of the rods, there is a gram-positive staining morphology. This can be defined as gram- variable.

  Which of the following best describes the organisms seen in this illustration:

  

  A. gram-positive
  B. gram-negative
  C. gram-variable
  D. acid-fast
  C. gram-variable

• Question 56:

  Which of the following statements applies to the venipuncture procedure?

  A. Standard Precautions must be observed
  B. the procedure includes preparation of the patient
  C. selecting and preparing the puncture site is part of the procedure
  D. all of the above
  D. all of the above

• Question 57:

  White top tubes are used for blood cultures. Question options:

  A. True
  B. False
  B. False

• Question 58:

  Bone marrow biopsies are helpful diagnostic tools in: Evaluation of anemia and thrombocytopenia Evaluation of cytopenias Diagnosing leukemias Can be part of evaluation for FUO Bone marrow biopsies are NOT used as screens for hematologic issues during routine check-ups. Hematology In which of the following situations would a bone marrow aspirate and biopsy possibly be used as an aid for diagnosis? (Select all that apply)

  A. Evaluation of anemia and thrombocytopenia
  B. Evaluation of cytopenias
  C. Diagnosis of leukemias
  D. Evaluation of fever of unknown origin (FUO)
  E. Screening for hematologic issues during routine check-ups
  A. Evaluation of anemia and thrombocytopenia
  D. Evaluation of fever of unknown origin (FUO)

• Question 59:

  Platelets do not circulate in inactivated, spiny forms. The spiny, sticky form of the platelet is initiated once the platelets become activated in response to blood vessel damage. Which of the following is not true in terms of platelet characteristics?

  A. Produced in the bone marrow by megakaryocytes.
  B. Possess an inherent sticky property that aids in adhesion and aggregation.
  C. Have a lifespan of roughly 9-12 days.
  D. Are normally found circulating in their inactive, spiny form.
  B. Possess an inherent sticky property that aids in adhesion and aggregation.

• Question 60:

  The correct answer which best fits the characteristics in this question is Mycobacterium kansasii.

  The remaining Mycobacterium strains can be elimated as:

  Mycobacterium marinum is considered a fast-grower.

  Mycobacterium scrofulaceum produce deep-yellow to orange pigmented colonies when grown in the either the light or dark.

  Mycobacterium avium grows colonies which are nonpigmented in the light and dark which do not intensify after light exposure.

  What is the MOST likely identification of an acid-fast bacillus that demonstrates the following characteristics?

  slow growth

  cream to tan colored colonies when grown in the dark

  development of yellow pigment upon exposure to light

  A. Mycobacterium kansasii
  B. Mycobacterium marinum
  C. Mycobacterium avium
  D. Mycobacterium scrofulaceum
  A. Mycobacterium kansasii