Chapter 12

Question 1

the biconcave cells in the blood that lack nuclei when they mature are

Answer 1

erythrocytes

Question 2

Which of the following are the most numerous in the body

Answer 2

erythorcytes

Question 3

in blood, which of the formed elements are responsible for transporting oxygen on hemoglobin

Answer 3

erthrocytes

Question 4

a primary function of lymphocytes is to

Answer 4

act against foreign substances by producing antibodies

Question 5

Platelets are best define as

Answer 5

cytoplasmic fragments of cells

Question 6

Non-protein nitrogenous substances including

Answer 6

all of the choices are correct

Question 7

As a platelet plug forms, platelets release the vasoconstricting substance called

Answer 7

serotonin

Question 8

the basic event in the formation of a blood clot is the change of

Answer 8

fibrinogen to fiber

Question 9

type AB blood contains

Answer 9

antigen A and B

Question 10

which of the following elements is included in hemogoblin molecules

Answer 10

iron

Question 11

the most active phagocytotic cells among the leukocytes are

Answer 11

neutrophils and monocytes

Question 12

the most important action of plasma albumins is

Answer 12

helping to maintain blood osmotic pressure

Question 13

Which red blood cell antigens may be responsible for hemolytic disease erythroblastosis fetalis of the newborn as a result of pregnancy

Answer 13

Rh negative mother and Rh positive fetus

Question 14

which of the following serves as an enzyme in the blood coagulation mechanism

Answer 14

thrombin

Question 15

The condition called cyanosis is caused by an increased blood concentration of

Answer 15

deoxyhemoglobin

Question 16

Sickle-cell anemia is caused by

Answer 16

a genetic defect of hemoglobin

Question 17

newborns are sometimes exposed to fluorescent light as a treatment for

Answer 17

jaundice

Question 18

pus is composed of

Answer 18

all of the choices are correct

Question 19

patients with leukemia have a tendency to bleed because they have a deficiency of

Answer 19

leukocytes

Question 20

erythroblastosis fetalis can be prevented by treating

Answer 20

Rh-negative mothers with anti-Rh antibodies

Question 21

which of the following is not included in hemostasis

Answer 21

blood coagulates due to agglutination

Question 22

(T or F) An embolism is a blood clot abnormality that travels in the blood stream

Answer 22

true

Question 23

(T or F) Persons with type AB blood are sometimes called universal donors

Answer 23

false

Question 24

(T or F) Red blood cells remove metabolic wastes from cells

Answer 24

true

Question 25

(T or F) A platelet plug is formed when fibrinogen is converted to fibrin

Answer 25

false

Question 26

(T or F) In an adult, red blood cells are produced primarily in the spleen

Answer 26

false

Question 27

(T or F) Vitamin B12 is important for the production of red blood cells because it is utilized in the synthesis of hemoglobin

Answer 27

false

Question 28

(T or F) An abnormally low white blood cell count is called leukocytosis

Answer 28

false

Question 29

(T or F) When hemoglobin molecules are decomposed, a greenish pigment called bilirubin is formed

Answer 29

false

Question 30

(T or F) The hormone released from the kidneys that promotes the production of red blood cells is erythropoietin

Answer 30

true

Question 31

(T or F) Normally, the most common type of leukocyte in a blood sample is the basophil

Answer 31

false

Question 32

(T or F) Hemophilia is the term used to describe the stoppage of bleeding by any one of several means

Answer 32

false

Question 33

(T or F) Histamine is a blood clot-inhibiting substance released by basophilis

Answer 33

false