Deck 18: Hematology

Question 1

What is the average life span of a red blood cell?

A) 1 week
B) 30 days
C) 120 days
D) 6 months

Answer 1

120 days

Question 2

The movement of leukocytes through the pores of the capillaries is known as

A) leukocytosis.
B) phagocytosis.
C) flagellation.
D) diapedesis.

Answer 2

diapedesis.

Question 3

Pus consists of all of the following except:

A) Dead leukocytes
B) Erythrocytes
C) Dead bacteria
D) Dead tissue cells

Answer 3

Erythrocytes

Question 4

How many pints of blood does the average adult contain?

A) 4-6 pints
B) 8-10 pints
C) 10-12 pints
D) 15-20 pints

Question 5

What is the normal range for a platelet count for an adult (in platelets per cubic millimeter of blood)?

A) 5000-10,000
B) 12-16
C) 180,000-300,000
D) 150,000-400,000

Question 6

Mr.Johnson has a hematocrit reading of 60.This is considered to be

A) increased.
B) decreased.
C) normal.
D) invalid.

Question 7

The function of hemoglobin is to

A) defend the body against infection.
B) transport oxygen in the body.
C) assist in blood clotting.
D) transport electrolytes in the body.

Question 8

The term hematocrit means

A) to separate blood.
B) the breakdown of blood.
C) a decrease in blood cells.
D) an increase in blood cells.

Question 9

Which of the following tests is not included in a CBC?

A) Differential white blood cell count
B) Hemoglobin
C) Hematocrit
D) Prothrombin time
E) Red and white blood cell counts

Question 10

An abnormal increase in the number of leukocytes is known as

A) lymphocytosis.
B) leukopenia.
C) leukocytosis.
D) hyperleukia.

Question 11

A mature erythrocyte has a _____ shape and _____ nucleus.

A) biconcave; contains a
B) round; contains a multilobed
C) convex; does not contain a
D) biconcave; does not contain a

Question 12

Leukocytes do their work in the

A) circulatory system.
B) tissues.
C) lymphatic system.
D) central nervous system.

Question 13

Mrs.Nelson has a white blood cell count of 14,500.This is considered to be

A) within the reference range.
B) above the reference range.
C) below the reference range.
D) an inaccurate test result.

Question 14

A low hemoglobin reading may occur with all of the following except:

A) Anemia
B) Polycythemia
C) Leukemia
D) Severe hemorrhaging

Question 15

The plasma functions in

A) transporting electrolytes needed by the cells.
B) transporting nutrients to the tissues.
C) picking up wastes from the tissues.
D) transporting antibodies,enzymes,and hormones.
E) All of the above

Question 16

What is the normal range for a red blood cell count for a woman (in cells per cubic millimeter of blood)?

A) 3-4 million
B) 4-5.5 million
C) 4.5-6.2 million
D) 5-6 million

Question 17

Mr.Peterson has a hemoglobin reading of 16.This is considered to be

A) within the reference range.
B) above the reference range.
C) below the reference range.
D) an invalid result.

Question 18

In an adult,red blood cells are formed in the red bone marrow of the

A) ribs.
B) sternum.
C) skull.
D) ends of the long bones of the limbs.
E) All of the above

Question 19

The buffy coat consists of

A) red blood cells.
B) white blood cells.
C) plasma.
D) white blood cells and platelets.

Question 20

The study of blood is known as

A) serology.
B) hematology.
C) blood chemistry.
D) blood banking.

Question 21

The results of a differential white blood cell count indicate there are no basophils.This is considered to be

A) below the reference range.
B) within the reference range.
C) above the reference range.
D) invalid.

Question 22

The results of a differential white blood cell count indicate that there are 40 neutrophils.This is considered to be

A) below the reference range.
B) within the reference range.
C) above the reference range.
D) invalid.

Question 23

What is the PT/INR result of a healthy individual with a normal clotting ability?

A) 10-20 seconds
B) 0.8-1.2
C) 1-2
D) 2.5-3.5

Question 24

Which of the following is not a granular leukocyte?

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

Question 25

What is the most common cause of microcytic anemia?

A) A lack of iron in the diet
B) A lack of vitamin B₁₂ in the body
C) Kidney disease
D) Bone cancer

Question 26

Which of the following white blood cells has a light-staining nucleus that is often masked by the presence of large dark-staining granules?

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

Question 27

Which of the following red blood cell indices measures the average size of a single red blood cell?

A) MCV
B) MCH
C) MCHC
D) RDW

Question 28

All of the following can result in a decrease in the red blood cell count except:

A) Leukemia
B) Hodgkin's disease
C) Polycythemia
D) Anemia

Question 29

Which of the following red blood cell indices measures the average concentration of hemoglobin within a single red blood cell?

A) MCV
B) MCH
C) MCHC
D) RDW

Question 30

The primary function of a neutrophil is to

A) engulf pathogens through phagocytosis.
B) act as a scavenger to clean up debris.
C) produce antibodies.
D) transport carbon dioxide.

Question 31

An increase in lymphocytes usually occurs

A) with an asthma attack.
B) with iron-deficiency anemia.
C) during an invasion by parasites.
D) with infectious mononucleosis.

Question 32

An increase in neutrophils occurs during

A) an acute infection.
B) polycythemia.
C) bone marrow damage.
D) a chronic infection.

Question 33

Which of the following can result in a normal elevation of the white blood cell count?

A) Pregnancy
B) Strenuous exercise
C) Stress
D) Treatment with corticosteroids
E) All of the above

Question 34

Which of the following is the largest white blood cell?

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

Question 35

Which of the following results in leukopenia?

A) Appendicitis
B) Chickenpox
C) Chemotherapy
D) Rheumatic fever

Question 36

An immature form of a neutrophil is known as a

A) plasma cell.
B) mast cell.
C) band.
D) seg.

Question 37

The nucleus of a neutrophil generally contains

A) three to five lobes.
B) six to eight lobes.
C) fine granules.
D) no lobes.

Question 38

Which of the following white blood cells has granules in the cytoplasm that stain bright reddish orange?

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

Question 39

An increase in eosinophils often occurs with

A) an acute infection.
B) congestive heart failure.
C) allergic conditions.
D) chemotherapy.

Question 40

When using a microhematocrit centrifuge,the hematocrit test results should be read at the

A) top of the red cell column.
B) bottom of the red cell column.
C) top of the buffy coat.
D) top of the plasma column.

Question 41

Which of the following may occur if the PT/INR blood tube is not filled to the exhaustion of the vacuum?

A) Hemolysis of the blood specimen
B) Clotting of the blood specimen
C) Inaccurate test results
D) Contamination of the blood specimen

Question 42

How often should a patient on warfarin therapy have a PT/INR test performed?

A) Once each week
B) Every 2-4 weeks
C) Every 2 months
D) Every 6 months

Question 43

What is the function of warfarin?

A) To inhibit the formation of blood clots
B) To prevent atrial fibrillation
C) To encourage blood clotting
D) To speed up production of red blood cells