Question 1

If the Vacutainer is not completely filled with blood, a false ESR reading may result.

Accepted Answer

A) True 
 B)False  True

Question 2

___________ cells, the most numerous types of agranular leukocytes, stimulate the activity of other T lymphocytes.

Accepted Answer

Helper T
Helper T cells, the most numerous types of agranular leukocytes, stimulate the activity of other T lymphocytes.

Question 3

In performance of a microhematocrit:

Accepted Answer

A) whole coagulated blood must be used 
B) the capillary tube must be completely filled and sealed on one end 
C) the open end of the capillary tube should be sealed with clay before centrifuging 
D) the capillary tubes should be centrifuged in a labeled, sealed Vacutainer tube 
A) whole coagulated blood must be used 
B) the capillary tube must be completely filled and sealed on one end 
C) the open end of the capillary tube should be sealed with clay before centrifuging 
D) the capillary tubes should be centrifuged in a labeled, sealed Vacutainer tube C

Question 4

Lavender-topped tubes are used for routine CBC counts.

Accepted Answer

A) True 
 B)False

Question 5

If a capillary tube is not plugged, it must be filled with a special clay before centrifugation.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following is an abnormal value for a differential?

Accepted Answer

A) 50% to 65% segmented neutrophils 
B) 0 to 7% band neutrophils 
C) 25% to 40% lymphocytes 
D) 50% to 70% basophils 
A) 50% to 65% segmented neutrophils 
B) 0 to 7% band neutrophils 
C) 25% to 40% lymphocytes 
D) 50% to 70% basophils

Question 7

The life span of an erythrocyte is approximately 90 days.

Accepted Answer

A) True 
 B)False

Question 8

Which statement is true about HDL?

Accepted Answer

A) It transports cholesterol. 
B) It is referred to as the "bad" cholesterol. 
C) If elevated, it can result in a greater risk of heart disease. 
D) All of the above are true. 
A) It transports cholesterol. 
B) It is referred to as the "bad" cholesterol. 
C) If elevated, it can result in a greater risk of heart disease. 
D) All of the above are true.

Question 9

On a blood glucose tolerance test, a level over 200 g/dL indicates diabetes mellitus.

Accepted Answer

A) True 
 B)False

Question 10

The granular leukocytes, which are called __________ leukocytes, include neutrophils, eosinophils, and basophils.

Accepted Answer

polymorphonuclear
The granular

Question 11

The WBC count is lowest in newborns and highest in adults.

Accepted Answer

A) True 
 B)False

Question 12

The ___________ is the standard unit for reporting PT results; the other method is the time required, in seconds, for a clot to form in a blood specimen.

Accepted Answer

INR
The INR is the standard un

Question 13

TSH levels are assessed to determine the function of what organ(s)?

Accepted Answer

A) Pancreas 
B) Pituitary 
C) Liver 
D) Kidneys 
A) Pancreas 
B) Pituitary 
C) Liver 
D) Kidneys

Question 14

An HDL cholesterol level over 20 mg/dL indicates a low risk for cardiac disease.

Accepted Answer

A) True 
 B)False

Question 15

The buffy coat:

Accepted Answer

A) is a layer of thrombocytes between the plasma and cells in a centrifuged microhematocrit tube 
B) can be seen in a centrifuged microhematocrit tube but not in a centrifuged Vacutainer tube 
C) is white 
D) is removed for Wright's staining during the differential portion of the CBC 
A) is a layer of thrombocytes between the plasma and cells in a centrifuged microhematocrit tube 
B) can be seen in a centrifuged microhematocrit tube but not in a centrifuged Vacutainer tube 
C) is white 
D) is removed for Wright's staining during the differential portion of the CBC

Question 16

Hormones detected in a thyroid panel include:

Accepted Answer

A) thyroxine 
B) triiodothyronine 
C) thyroid-stimulating hormone 
D) all of the above 
A) thyroxine 
B) triiodothyronine 
C) thyroid-stimulating hormone 
D) all of the above

Question 17

RBC values range from 4,000 to 6,000 cells/mm³.

Accepted Answer

A) True 
 B)False

Question 18

Blood is able to form a clot as the result of a coordinated process involving more than 50 blood factors and processes.

Accepted Answer

A) True 
 B)False

Question 19

Fasting is necessary before cholesterol testing because HDL and LDL cholesterol are greatly affected by food consumption.

Accepted Answer

A) True 
 B)False

Question 20

Granular leukocytes:

Accepted Answer

A) have granules in the nucleus of the cell 
B) function primarily in the plasma 
C) act as phagocytes 
D) all of the above 
A) have granules in the nucleus of the cell 
B) function primarily in the plasma 
C) act as phagocytes 
D) all of the above

Exam 54: Assisting in the Analysis of Blood

If the Vacutainer is not completely filled with blood, a false ESR reading may result.

___________ cells, the most numerous types of agranular leukocytes, stimulate the activity of other T lymphocytes.

In performance of a microhematocrit:

Lavender-topped tubes are used for routine CBC counts.

If a capillary tube is not plugged, it must be filled with a special clay before centrifugation.

Which of the following is an abnormal value for a differential?

The life span of an erythrocyte is approximately 90 days.

Which statement is true about HDL?

On a blood glucose tolerance test, a level over 200 g/dL indicates diabetes mellitus.

The granular leukocytes, which are called __________ leukocytes, include neutrophils, eosinophils, and basophils.

The WBC count is lowest in newborns and highest in adults.

The ___________ is the standard unit for reporting PT results; the other method is the time required, in seconds, for a clot to form in a blood specimen.

TSH levels are assessed to determine the function of what organ(s)?

An HDL cholesterol level over 20 mg/dL indicates a low risk for cardiac disease.

The buffy coat:

Hormones detected in a thyroid panel include:

RBC values range from 4,000 to 6,000 cells/mm³.

Blood is able to form a clot as the result of a coordinated process involving more than 50 blood factors and processes.

Fasting is necessary before cholesterol testing because HDL and LDL cholesterol are greatly affected by food consumption.

Granular leukocytes:

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