Medical Laboratory Technician Exam Medical Laboratory Technician Hematology and Coagulation Questions and Answers 3

Question 1

Which red blood cell inclusion is identified using a supravital stain such as new methylene blue?

Accepted Answer

Heinz bodies

Answer

Howell-Jolly bodies

Answer

Pappenheimer bodies

Answer

Basophilic stippling

Question 2

In von Willebrand disease type 1, which laboratory finding is most expected?

Accepted Answer

Prolonged bleeding time with decreased vWF antigen

Answer

Prolonged PT with normal aPTT

Answer

Decreased platelet count with normal bleeding time

Answer

Normal aPTT with elevated fibrinogen

Question 3

A peripheral blood smear reveals teardrop cells (dacrocytes), nucleated red blood cells, and immature granulocytes. This leukoerythroblastic picture is most suggestive of which condition?

Accepted Answer

Myelofibrosis

Answer

Iron deficiency anemia

Answer

Chronic lymphocytic leukemia

Answer

Immune thrombocytopenic purpura

Question 4

What is the principle behind the prothrombin time (PT) test?

Accepted Answer

Tissue factor activates the extrinsic pathway in recalcified plasma

Answer

A contact activator initiates the intrinsic pathway

Answer

Thrombin is added directly to measure fibrinogen conversion

Answer

Ristocetin induces platelet agglutination via vWF

Question 5

Which cell line is most characteristically elevated in chronic myelogenous leukemia (CML) during the chronic phase?

Accepted Answer

Granulocytic series with basophilia

Answer

Lymphocytic series with smudge cells

Answer

Monocytic series with promonocytes

Answer

Erythroid series with ringed sideroblasts

Question 6

A patient on warfarin therapy has an INR of 5.2 with active bleeding. What is the most appropriate immediate laboratory-relevant intervention?

Accepted Answer

Administer vitamin K and fresh frozen plasma

Answer

Increase the warfarin dose

Answer

Administer platelet concentrate

Answer

Perform a mixing study to confirm inhibitor