Deck 1: Introduction

Question 1

Which of the following represents an event in the pre-examination phase of laboratory testing?

A)Reporting of results
B)Interpretation of laboratory data
C)Performing a test procedure
D)Labeling a blood collection tube

Answer 1

Labeling a blood collection tube

Question 2

The liquid portion of blood is called:

A)Bilirubin
B)Plasma
C)Whole blood
D)Albumin

Answer 2

Plasma

Question 3

Which of the following can explain a decrease in the number of circulating erythrocytes?

A)Blood loss
B)Infection
C)Dehydration
D)Neutropenia

Answer 3

Blood loss

Question 4

When decreased in concentration,which of the following formed elements could result in hypoxia?

A)Leukocytes
B)Erythrocytes
C)Platelets
D)None of the above

Question 5

Which of the following blood cell components would be most influenced in a patient with an infection of the tonsils (tonsillitis)?

A)Leukocyte
B)Erythrocyte
C)Thrombocyte
D)Hemoglobin

Question 6

The protein found in erythrocytes that is responsible for oxygen transport is:

A)Albumin
B)Gamma globulin
C)Oxygen protein
D)Hemoglobin

Question 7

When bilirubin is increased above the reference range,what disease process should be suspected if liver disease is ruled out?

A)Increased osmotic pressure
B)Hormone imbalance
C)Decreased albumin
D)Increased metabolism of hemoglobin

Question 8

What component of plasma assists in the transport of bilirubin?

A)Enzymes
B)Hydrogen
C)Calcium
D)Albumin

Question 9

Which component of blood passes through blood vessel walls into surrounding tissues to defend the body against invading foreign antigens?

A)Red blood cells
B)Platelets
C)Leukocytes
D)Gamma globulin

Question 10

Which of the following is an expected finding in a newborn?

A)WBC count = 2 * 10⁹/L
B)PLT count = 100* 10⁹/L
C)Hemoglobin = 17.0 g/dL
D)RBC count = 3.50 * 10⁹/L

Question 11

Which of the following blood constituents is associated with increased red blood cell destruction?

A)Bilirubin
B)Albumin
C)Blood urea nitrogen
D)Immunoglobulin

Question 12

The predominant blood leukocyte found in children is the:

A)Monocyte
B)Lymphocyte
C)Neutrophil
D)Eosinophil

Question 13

What percentage of the total blood volume is composed of formed elements?

A)55
B)45
C)100
D)10

Question 14

Which two populations account for the greatest difference in reference intervals?

A)Adults and 12-year-olds
B)Newborns and 12-year-olds
C)Newborns and adults
D)Whites and blacks

Question 15

Platelets and coagulation proteins are circulating components responsible for what process?

A)Hemolysis
B)Hemostasis
C)Normal cell production
D)Immune defense

Question 16

The cellular component of blood that is involved in hemostasis is:

A)Leukocyte
B)Erythrocyte
C)Thrombocyte
D)Hemoglobin

Question 17

Which of the following is not a role of the clinical laboratory professional?

A)Correlate lab results with appropriate disease states
B)Correlate lab results with disease pathophysiology
C)Correlate lab results with treatment
D)Order reflex tests

Question 18

Which of the following is not a cellular component of blood?

A)Leukocyte
B)Platelets
C)Erythrocyte
D)Albumin

Question 19

An abnormal test result is defined as:

A)The opposite of a normal test result
B)A value that is outside the reference interval for a particular analyte
C)A value that is below the reference interval for multiple analytes
D)A value that is above the reference interval for a single analyte

Question 20

Which of the following is a hematology screening test?

A)Complete blood count (CBC)
B)Activated partial thromboplastin time (APTT)
C)Osmotic pressure
D)Chloride concentration

Question 21

Give two reasons for transfusing leukoreduced,irradiated,packed red blood cells.

Question 22

Which of the following could be reflexed as the result of an abnormal RBC count?

A)Prothrombin time
B)Blood urea nitrogen
C)Reticulocyte count
D)WBC count

Question 23

An unlabeled blood collection tube is delivered to the hematology laboratory.The laboratory professional requests a redraw because an error in which phase of laboratory testing has occurred?

A)Pre-examination
B)Examination
C)Post-examination
D)Analytical

Question 24

Patients who are unable to dissolve a fibrin blood clot are likely to present with which of the following pathologies?

A)Anemia
B)Bleeding
C)Leukemia
D)Thrombosis

Question 25

Explain how the hemostatic pathway is activated in times of need.

Question 26

All of the following must be considered when establishing a reference interval for a group of individuals except:

A)The geographic area
B)Age of the population
C)Occupations of the population
D)Sex of the population

Question 27

Which of the following tests could be reflexed as the result of an abnormal prothrombin time?

A)Molecular analysis of clotting factors
B)Complete blood count
C)Measurement of albumin
D)Hemoglobin analysis

Question 28

Name three blood analytes that show significantly different results in adults,children,and infants.

Question 29

Explain how screening tests and reflexing testing are related.

Question 30

Explain how a reference interval is determined.