BOC HEMATOLOGY Exam Practice Questions with
Revised Answers| Verified 100% Correct
. A red blood cell about 5micrometers in diameter that stains bright red and shows no
central pallor is a - ✔✔a. spherocyte
Examination of a Wright-stained smear of the same sample would most likely show -
✔✔c. normocytic, hypochromic erythrocytes
. Evidence of active red cell regeneration may be indicated on a blood smear by: -
✔✔a. basophilic stippling, nucleated red blood cells and polychromasia
. The presence of excessive rouleaux formation on a blood smear is often accompanied
by an increased - ✔✔b. sedimentation rate
. The characteristic peripheral blood morphologic feature in multiple myeloma is -
✔✔b. rouleaux formation
. In polycythemia vera, the hemoglobin, hematocrit, red blood cell count and red cell
mass are - ✔✔a. elevated
. The M:E ratio in polycythemia vera is usually - ✔✔a. normal
. Many microspherocytes, schistocytes and budding off of spherocytes can be seen on
peripheral blood smears of patients with - ✔✔d. extensive burns
,. Which of the following is most closely associated with erythroleukemia? - ✔✔a.
ringed sideroblasts, nuclear budding, and Howell-Jolly bodies
. The most characteristic peripheral blood smear finding in multiple myeloma is -
✔✔d. rouleaux formation of the red cells
. Chart - ✔✔c. a high titer of cold agglutinins
. A common source of interference in the cyanmethemoglobin method is - ✔✔b. very
high WBC count
. The most appropriate screen test for detecting hemoglobin F is - ✔✔c. Kleihauer-
Betke
. the most appropriate screening test for hemoglobin S is - ✔✔b. dithionite solubility
. Hematology standards include - ✔✔d. certified cyanmethemoglobin solution
. When using turbidity (solubility) method for detecting the presence of hemoglobin S,
an incorrect interpretation may be made when there is a(n) - ✔✔d. increased
hemoglobin
. the following results were obtained from a post-surgical patient receiving total
parenteral nutrition
, Hospital day 17 18 19
Hgb 12.1g/dL 11.6g/dL 9.4g/dL
Hct 29.2% 29.4% 28.8%
The most consistent explanation for the above data is - ✔✔d. lipid interference on
days 17 and 18
. A patient has a high cold agglutinin titer. Automated cell counter results reveal and
elevated MCV, MCH, and MCHC. Individual erythrocytes appear normal on a stained
smear, but agglutinates are noted. The appropriate course of action would be to -
✔✔d. repeat the determinations using a prewarmed microsample of diluted blood
. A blood sample from a patient with a high-titer cold agglutinin, analyzed at room temp
with an electronic particle counter would cause an error in the - ✔✔d. MCV and
MCHC
. When using an electronic cell counter, which of the following results can occur in the
presence of a cold agglutinin? - ✔✔a. increased MCV and decreased RBC
. In polycythemia vera, the leukocyte alkaline phophatase activity is - ✔✔a. elevated
. Which of the following is the formula for mean corpuscular hemoglobin (MCH)? -
✔✔d. (Hgb x 10)/RBC
. What is the MCH if the Hct is 20%, the RBC is 2.4 x 10^6/uL and the Hgb is 5 g/dL? -
✔✔a. 21 um^3
Revised Answers| Verified 100% Correct
. A red blood cell about 5micrometers in diameter that stains bright red and shows no
central pallor is a - ✔✔a. spherocyte
Examination of a Wright-stained smear of the same sample would most likely show -
✔✔c. normocytic, hypochromic erythrocytes
. Evidence of active red cell regeneration may be indicated on a blood smear by: -
✔✔a. basophilic stippling, nucleated red blood cells and polychromasia
. The presence of excessive rouleaux formation on a blood smear is often accompanied
by an increased - ✔✔b. sedimentation rate
. The characteristic peripheral blood morphologic feature in multiple myeloma is -
✔✔b. rouleaux formation
. In polycythemia vera, the hemoglobin, hematocrit, red blood cell count and red cell
mass are - ✔✔a. elevated
. The M:E ratio in polycythemia vera is usually - ✔✔a. normal
. Many microspherocytes, schistocytes and budding off of spherocytes can be seen on
peripheral blood smears of patients with - ✔✔d. extensive burns
,. Which of the following is most closely associated with erythroleukemia? - ✔✔a.
ringed sideroblasts, nuclear budding, and Howell-Jolly bodies
. The most characteristic peripheral blood smear finding in multiple myeloma is -
✔✔d. rouleaux formation of the red cells
. Chart - ✔✔c. a high titer of cold agglutinins
. A common source of interference in the cyanmethemoglobin method is - ✔✔b. very
high WBC count
. The most appropriate screen test for detecting hemoglobin F is - ✔✔c. Kleihauer-
Betke
. the most appropriate screening test for hemoglobin S is - ✔✔b. dithionite solubility
. Hematology standards include - ✔✔d. certified cyanmethemoglobin solution
. When using turbidity (solubility) method for detecting the presence of hemoglobin S,
an incorrect interpretation may be made when there is a(n) - ✔✔d. increased
hemoglobin
. the following results were obtained from a post-surgical patient receiving total
parenteral nutrition
, Hospital day 17 18 19
Hgb 12.1g/dL 11.6g/dL 9.4g/dL
Hct 29.2% 29.4% 28.8%
The most consistent explanation for the above data is - ✔✔d. lipid interference on
days 17 and 18
. A patient has a high cold agglutinin titer. Automated cell counter results reveal and
elevated MCV, MCH, and MCHC. Individual erythrocytes appear normal on a stained
smear, but agglutinates are noted. The appropriate course of action would be to -
✔✔d. repeat the determinations using a prewarmed microsample of diluted blood
. A blood sample from a patient with a high-titer cold agglutinin, analyzed at room temp
with an electronic particle counter would cause an error in the - ✔✔d. MCV and
MCHC
. When using an electronic cell counter, which of the following results can occur in the
presence of a cold agglutinin? - ✔✔a. increased MCV and decreased RBC
. In polycythemia vera, the leukocyte alkaline phophatase activity is - ✔✔a. elevated
. Which of the following is the formula for mean corpuscular hemoglobin (MCH)? -
✔✔d. (Hgb x 10)/RBC
. What is the MCH if the Hct is 20%, the RBC is 2.4 x 10^6/uL and the Hgb is 5 g/dL? -
✔✔a. 21 um^3
