Test Bank For Rodak's Hematology: Clinical Principles and Applications, 7th Edition by; Elaine M. Keohane| All Chapters 1-43| Latest Edition

1.
Chapter 01-01
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Hematology is the study of:
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, *a. blood cells.
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b. serum electrolytes. m



c. plasma hormone levels. m m



d. bacteria in the blood. m m m




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Hematology is the study of blood cells*red blood cells, white blood cells, and
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platelets. Plasma and serum electrolytes and hormone levels are evaluated in various
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subdivisions of clinical chemistry, and bacteria are evaluated in clinical microbiology.
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2. Chapter 01-02 m



The morphology of blood cells is important to evaluate:
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a. every time a complete blood count (CBC) is requested on a patient.
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b. when an instrument-generated flag is obtained.
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*c. when a profiling instrument result is abnormal.
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d. when the white count is elevated.
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Every laboratory must determine*based on its instrumentation, needs of the
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clinician and other parameter flags that alert the medical laboratory scientist to the
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necessity for further evaluation*when it is necessary to evaluate cell morphology. Many
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instrument-generated flags, although useful, may not require review. If an automated CBC
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does not suggest the need, no reason exists to evaluate the blood film, even if the white
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count is elevated.
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3. Chapter 01-03 m



Who is ultimately responsible for determining the specimen integrity before analysis?
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*a. Medical laboratory professional
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b. Nursing staff m



c. Phlebotomist
d. Specimen-processing personnel m




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The medical laboratory scientist is responsible for ensuring the integrity of a
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specimen before analysis. Only he or she can judge whether the specimen is acceptable
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so that valid results can be obtained. Acceptable criteria include such things as type of
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,specimen for the test ordered (e.g., blood, serum, urine); appropriate additive present (if
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needed) and amount of specimen relative to the additive; time interval since obtained;
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and presence or absence of hemolysis, lipemia, and other similar conditions. None of the
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other personnel named have the education and understanding to fully make that
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judgment.
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, 4. Chapter 01-04 Hematocrit is m m m



also called:
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a. white cell count. m m



b. bone marrow examination. m m



c. red blood cell (RBC) count.
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*d. packed red cell volume.
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Historically the hematocrit was determined by centrifuging an aliquot of
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anticoagulated whole blood under specified conditions (e.g., centrifugal force, capillary
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tube length, and bore diameter) and then determining the ratio of the space occupied by
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the packed red cells compared with that of the entire blood volume in the capillary tube,
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often expressed as a percentage. Hence, it is also called the packed mred mcell mvolume.
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5. Chapter 01-05 m



The primary function of platelets is to:
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a. defend the body against bacterial invasion.
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b. carry oxygen to tissues. m m m



*c. facilitate blood clotting.
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d. regulate acid-base balance.
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Whenever disruption occurs to a blood vessel so that bleeding results,
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platelets respond initially to stop the bleeding in small vessels; they also play an integral
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role in facilitating the formation of a blood clot. White cells defend against bacterial
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invasion; red cells (i.e., hemoglobin) carry oxygen to tissues; and a complex interaction
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of plasma electrolytes, proteins, and carbon dioxide participates in acid-base balance.
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6. Chapter 01-06 m



Which of the following can be evaluated only mthrough the microscopic examination of a
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stained blood film?
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a. White blood cell (WBC) count m m m m



b. Reticulocyte count m



c. Hemoglobin concentration m