Medical Technologist Test Hematology 3

Question 1

Which parameter directly measures the variation in red blood cell size?

Accepted Answer

RDW

Answer

MCV

Answer

MCHC

Answer

MCH

Question 2

A platelet count below which threshold is considered thrombocytopenia?

Accepted Answer

150,000/µL

Answer

50,000/µL

Answer

100,000/µL

Answer

200,000/µL

Question 3

Heinz bodies in red blood cells are composed of which substance?

Accepted Answer

Denatured hemoglobin

Answer

Hemosiderin

Answer

DNA remnants

Answer

Iron deposits

Question 4

Which type of anemia is characterized by an MCV less than 80 fL?

Accepted Answer

Microcytic anemia

Answer

Normocytic anemia

Answer

Macrocytic anemia

Answer

Hemolytic anemia

Question 5

What is the function of von Willebrand factor (vWF) in hemostasis?

Accepted Answer

Mediates platelet adhesion to damaged endothelium

Answer

Activates the fibrinolytic system

Answer

Inhibits thrombin formation

Answer

Dissolves fibrin clots

Question 6

Which test is most specific for monitoring warfarin (Coumadin) therapy?

Accepted Answer

PT/INR

Answer

aPTT

Answer

Platelet aggregation study

Answer

Thrombin time