MLS Review - Hematology REAL EXAM QUESTIONS AND ANSWERS A+ GRADED

MLS Review - Hematology REAL EXAM QUESTIONS AND ANSWERS A+ GRADED Insufficient centrifugation will result in: a. a false increase in hematocrit (Hct) value b. a false decrease in Hct value c. No effect on Hct value d. all of these options, dependent on the patient - ANS a. insufficient centrifugation does not pack down the red blood cells; therefore, the Hct, which is the volume of packed cells, will increase variation in red cell size observed on the peripheral smear is described as: a. anisocytosis b. hypochromia c. poikilocytosis d. pleocytosis - ANS a. a mature erythrocyte is approximately 7-8 um in diameter. Variation in normal size is denoted by the term anisocytosis. Hypochromia is a term that indicates increased central pallor in erythrocytes, and poikilocytosis denotes variation in red cell shape Which of the following is the preferable site for bone marrow aspiration and biopsy in an adult? a. Iliac crest b. Sternum c. Tibia D. Spinous processes of a vertebra - ANS a. the iliac crest is the most frequently used site for bone marrow aspiration and biopsy. This site is the safest and most easily accessible, with the bone just beneath the skin, and neither blood vessels nor nerves are in the vicinity Mean cell volume (MCV) is calculated using the following formula: a. (Hb / RBC) x 10 b. (Hct / RBC) x 10 c. (Hct / Hb) x 100 d. (Hb / RBC) x 100 - ANS b. MCV is the average "volume" of the red cells. This is obtained by dividing the Hct or packed cell volume (PCV) by the red blood cell (RBC) count in millions per microliter of blood and multiplying by 10. The MCV is expressed in cubic microns or femtoliters (fL). What term describes the change in shape of erythrocytes seen on a Wright's-stained peripheral blood smear? a. Poikilocytosis b. anisocytosis c. hypochromia d. polychromasia - ANS a. Variation in shape of the erythrocytes on a peripheral blood smear is poikilocytosis. Anisocytosis refers to a change in size. Hypochromia is an increase in central pallor in erythrocytes. Polychromasia describes the bluish tinge of the immature erythrocytes