Complete Solution Manual Physical Geography
Laboratory Manual 12th Edition Questions & Answers
with rationales
A dilution commonly used for a routine sperm count is: - ANSWER 1:20
A manual white blood cell count was performed by the hematology technologist. The
cell counts for both sides were 99 and 164 respectively. All nine large squares were
counted on each side. The dilution for this kit was pre-measured at 1:100. What
should the technologist report as the white cell count? - ANSWER Cannot report
How many 1 mm x 1 mm squares is the Neubauer hemacytometer counting grid
composed of? - ANSWER Nine per side
Twenty microliters (20 µL) of blood are diluted with 1.98 mL of diluent. Both sides of
the hemocytometer are charged with the diluted sample and the entire ruled area of
the center square is counted on both sides. A total of 356 platelets are counted
(combined total of the two large squares). What is the platelet count per liter? -
ANSWER 178 x 109/L
What would be the logical first step to obtain correct values when the following
results were obtained on an electronic particle counter in hematology for an alcoholic
patient?
WBC 6,500/cu. mmMCV 90.1 fLRBC 4,550,000/cu. mmMCH 39.6 pgHGB 18.0
g/dLMCHC 43.4%HCT 41.5% - ANSWER Check and correct for lipemia
If the spinal fluid is slightly hazy, what is the best dilution? - ANSWER 1:10
A 1:10 dilution is made on a CSF sample. Five squares on each side of the
hemacytometer are counted for a total of 10 squares and a total of 150 cells are
recorded. What is the count per microliter? - ANSWER 1500
Which of the following tests would be most affected by microclots in an EDTA tube
drawn for a CBC? - ANSWER Platelet count
What is the BEST type of microscopy for performing manual platelet counts? -
ANSWER Phase contrast
What is the optimal time to begin initial microscopic examination of a semen
specimen, assuming liquefaction is complete? - ANSWER 30 minutes
Which one of the following hematological determinations is MOST reliable for
evaluating bone marrow erythropoietic activity? - ANSWER Reticulocyte count
, When preparing a slide for morphologic examination, what is the reason for adding a
drop of albumin to the cerebrospinal fluid (CSF) sample prior to cytocentrifugation? -
ANSWER Preserve the integrity of the cells.
The blood is diluted 1:100 and charged on the hemocytometer counting chambers
on both sides. If the average platelet count from a counting chamber in one mm2
(one large square) is 68, what is the calculated platelet count? - ANSWER
68,000/mm3
All of the following tests are included in a complete blood count (CBC), EXCEPT? -
ANSWER Blood culture
The appropriate magnification for a manual RBC cell count using a hemocytometer
is which of the following? - ANSWER 40X (Dry)
An automated hematology counter flagged the white blood cell count. Upon review of
the peripheral blood smear, the technologist viewed many cells that appeared similar
to those in this image. What should the technologist report? - ANSWER
Reactive/atypical lymphocyte
How many large hemacytometer squares contain a total volume of 1 µL (microliter)
of fluid? - ANSWER 10
A semen specimen was collected three hours before it was brought to the laboratory
for examination. What course of action should be taken? - ANSWER Report the
specimen as compromised on the final report.
Given the following information, what is the CORRECTED white count?
Initial White count = 35,000/µL92 nucleated red blood cells are noted per 100 WBC's
counted on the manual differential - ANSWER 18,229/µL
The impedance principle shown in this illustration is best described by the following
statement: - ANSWER Blood cells or other particles are counted and sized based on
changes in electrical resistance as they pass between two electrodes
A 1:100 dilution of a patient's peripheral blood was made and a total of 136 platelets
were counted in 5 squares of the RBC area of a Neubauer-ruled hemocytometer.
What is the Platelet count? Note: The volume correction factor is 50 µL. - ANSWER
680 x 103/µL
Charcot-Leyden crystals in stool may be associated with an immune response and
are thought to be the breakdown products of: - ANSWER Eosinophils
A hemocytometer is generally used for all of the following, EXCEPT? - ANSWER
Synovial fluid crystal counts
A manual platelet count was performed using a Neubauer hemacytometer. The total
platelet count was 356 x 103/µL. A platelet estimate was then performed on the
peripheral blood smear. Ten fields were counted and yielded the following results:
17, 16, 15, 20, 19, 17, 19, 16, 20, 18. The platelet estimation factor for the
Laboratory Manual 12th Edition Questions & Answers
with rationales
A dilution commonly used for a routine sperm count is: - ANSWER 1:20
A manual white blood cell count was performed by the hematology technologist. The
cell counts for both sides were 99 and 164 respectively. All nine large squares were
counted on each side. The dilution for this kit was pre-measured at 1:100. What
should the technologist report as the white cell count? - ANSWER Cannot report
How many 1 mm x 1 mm squares is the Neubauer hemacytometer counting grid
composed of? - ANSWER Nine per side
Twenty microliters (20 µL) of blood are diluted with 1.98 mL of diluent. Both sides of
the hemocytometer are charged with the diluted sample and the entire ruled area of
the center square is counted on both sides. A total of 356 platelets are counted
(combined total of the two large squares). What is the platelet count per liter? -
ANSWER 178 x 109/L
What would be the logical first step to obtain correct values when the following
results were obtained on an electronic particle counter in hematology for an alcoholic
patient?
WBC 6,500/cu. mmMCV 90.1 fLRBC 4,550,000/cu. mmMCH 39.6 pgHGB 18.0
g/dLMCHC 43.4%HCT 41.5% - ANSWER Check and correct for lipemia
If the spinal fluid is slightly hazy, what is the best dilution? - ANSWER 1:10
A 1:10 dilution is made on a CSF sample. Five squares on each side of the
hemacytometer are counted for a total of 10 squares and a total of 150 cells are
recorded. What is the count per microliter? - ANSWER 1500
Which of the following tests would be most affected by microclots in an EDTA tube
drawn for a CBC? - ANSWER Platelet count
What is the BEST type of microscopy for performing manual platelet counts? -
ANSWER Phase contrast
What is the optimal time to begin initial microscopic examination of a semen
specimen, assuming liquefaction is complete? - ANSWER 30 minutes
Which one of the following hematological determinations is MOST reliable for
evaluating bone marrow erythropoietic activity? - ANSWER Reticulocyte count
, When preparing a slide for morphologic examination, what is the reason for adding a
drop of albumin to the cerebrospinal fluid (CSF) sample prior to cytocentrifugation? -
ANSWER Preserve the integrity of the cells.
The blood is diluted 1:100 and charged on the hemocytometer counting chambers
on both sides. If the average platelet count from a counting chamber in one mm2
(one large square) is 68, what is the calculated platelet count? - ANSWER
68,000/mm3
All of the following tests are included in a complete blood count (CBC), EXCEPT? -
ANSWER Blood culture
The appropriate magnification for a manual RBC cell count using a hemocytometer
is which of the following? - ANSWER 40X (Dry)
An automated hematology counter flagged the white blood cell count. Upon review of
the peripheral blood smear, the technologist viewed many cells that appeared similar
to those in this image. What should the technologist report? - ANSWER
Reactive/atypical lymphocyte
How many large hemacytometer squares contain a total volume of 1 µL (microliter)
of fluid? - ANSWER 10
A semen specimen was collected three hours before it was brought to the laboratory
for examination. What course of action should be taken? - ANSWER Report the
specimen as compromised on the final report.
Given the following information, what is the CORRECTED white count?
Initial White count = 35,000/µL92 nucleated red blood cells are noted per 100 WBC's
counted on the manual differential - ANSWER 18,229/µL
The impedance principle shown in this illustration is best described by the following
statement: - ANSWER Blood cells or other particles are counted and sized based on
changes in electrical resistance as they pass between two electrodes
A 1:100 dilution of a patient's peripheral blood was made and a total of 136 platelets
were counted in 5 squares of the RBC area of a Neubauer-ruled hemocytometer.
What is the Platelet count? Note: The volume correction factor is 50 µL. - ANSWER
680 x 103/µL
Charcot-Leyden crystals in stool may be associated with an immune response and
are thought to be the breakdown products of: - ANSWER Eosinophils
A hemocytometer is generally used for all of the following, EXCEPT? - ANSWER
Synovial fluid crystal counts
A manual platelet count was performed using a Neubauer hemacytometer. The total
platelet count was 356 x 103/µL. A platelet estimate was then performed on the
peripheral blood smear. Ten fields were counted and yielded the following results:
17, 16, 15, 20, 19, 17, 19, 16, 20, 18. The platelet estimation factor for the
