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The percentage of solids in a sample of human blood is normally abount
a.15%
b.30%
c.45%
d.60%

45%

The biconcave cells in blood that lack nuclei when they are mature are the
a. white blood cells
b.red blood cells
c.platelets
d.macrophages

red blood cells

Wich of the following is an agranulocyte?
a.basophil
b.eosinophil
c.monocyte
d.polymorphonuclear leukocyte

monocyte

The normal white blood cell count is

5,000-10,000 cell/mm of blood

Platelets are best described as
a.giant, multinucleated cells
b.cytoplasmic fragments of cells
c.Immature leukocytes
d. lymphoid cells

cytoplasmic fragments of cells

Nonprotein nirtogenous substances include
a.amino acids
b.urea
c.creatinine
d.all of the above

all of the above

As a platelet plug forms, platelets release the vasoconstricting substances called
a.collagen
b.creatine
c.serotonin
d.fibrin

serotonin

The basic event in the formation of a blood clot is the change of
a.fibrinogen to fibrin
b.fibrin to fibrinogen
c.thrombin to prothrombin
d.vitamin K to prothrombin

fibrinogen to fibrin

Type AB blood contains
a.agglutinogen A and B
b.agglutinogen A and agglutinin B
c.agglutinin A and agllutinogen B
d.agglutinin A and B

agglutinogen A and B

Which of the following is the correct sequence for the development of a red blood cell?
a. erythrocyte,hematoblast,erythroblast
b.erythroblast,hemoctyoblast,erythrocyte
c.hemoctyoblast,erythrocyte, erythroblast
d.hemocytoblast, erythroblast, erythrocyte

hemocytoblast, erythroblast, erythrocyte

A primary function of lymphocytes is to
a.phagocytize damaged cells
b.produce enzymes that dissolve blood clots
c.release substances that Initiate blood clots
d.act against foreign substances

act against foreign substances

After hemoglobin is broken down into heme and globin, what ultimately happens to the heme?
a. It is removed by the liver as bilirubin
b.It is excreted by the liver as heme
c.It is removed by the liver as bile pigments
d.It is converted to other types of plasma proteins

It is removed by the liver as bile pigments

The release of tissue thromboplastin initiates
a. the extrinsic clotting mechanism
b.the Intrinsic clotting mechanism
c.platelet plug formation
d.none of the above

the extrinsic clotting mechanism

What is the difference between serum and plasma?
a.plasma contains calcium; serum does not
b.plasma does not have blood cells; serum does
c.plasma contains fibrinogen;serum does not
d.plasma contains albumin;serum does not

plasma contains fibrinogen; serum does not

Which of the following formed elements releases serotonin?
a.erythrocytes
b.platelets
c.neutroplils
d.basophils

platelets

Of the following, which are most active as phagocytes?
a.erythrocytes
b.neutrophils
c.platelets
d.eosinophils

neutrophils

Which of the following is not needed for the formation of a blood clot?
a.calcium
b.fibrinogen
c.prothrombin
d.albumin

albumin

Agglutinogens of the various blood types are examples of
a.antibodies
b.white blood cells
c.antigens
d.none of the above

antigens

Erythroblastosis fetalis is most likely to become a problem In Rh-negative mothers as
a. second Rh-positive fetus develops
b.a first Rh-positive fetus develops
c.a second Rh-negative fetus develops
d.a first Rh-negative fetus develops

a second Rh-positive fetus develops

Heparin prevents the clotting of blood by
a.binding to calcium ions
b.interfering with the formation of thrombin and fibrinogen
c.inhibiting the formation of prothrombin activator and the action of thrombin on fibrinogen
d.none of the above

C.

The condition called cyanosis is caused by a decreased blood concentration of
a.deoxyhemoglobin
b.oxyhemoglobin
c.carbon dioxide
d.carbon monoxide

oxyhemoglobin

Sickle-cell anemia is caused by
a. a lack of dietary iron
b.a lack of intrinsic factor
c.an excess of hemoglobin
d.an abnormal form of hemoglobin

an abnormal form of hemoglobin

Newborns are sometimes exposed to fluorescent light as a treatment of
a.sickle-cell anemia
b.cyanosis
c.physiologic jaundice
d.pernicious anemia

physiologic jaundice

Vitamin B-2 is poorly absorbed in the absence of
a.folic acid
b.erythroprotein
c.Intrinsic factor
d.erythroblasts

intrinsic factor

The form of anemia that is caused by a lack of dietary iron is called
a.pernicious anemia
b.aplastic anemia
c.hemolytic anemia
d.hypochromic anemia

hypochromic anemia

Pus is composed of
a.leukocytes
b.bacteria
c.damaged body cell
d. all of the above

all of the above

As a result of polycythemia, the blood flow

decreases and hemoglobin becomes more deoxygenated

As a consequence of starvation or a protein-deficient diet, the blood protein concentration
a.increases and water accumulates in tissue spaces
b.decreases and water accumulates in tissue spaces
c.increases and water accumulates in cells.
d. decreases and eater accumulates in cells

decreases and water accumulates in tissue spaces

If body cells lack LDL receptors, the plasma concentration of LDL molecules
a.increases and blood cholesterol concentration increases
b.increases and the blood cholesterol concentration decreases
c.decreases and the blood cholesterol concentration increases
d.decreases and the blood cholesterol concentration decreases

increases and blood choesterol concentration increases

Prothrombin time is a blood test used to evaluate
a.Intravascular clotting
b.the Hageman factor
c.Extrinsic clotting mechanism
d.Intrinsic clotting mechanism

Intrinsic clotting mechanism

A pulmonary embolism is most likely caused by a clot reaching
a. a lung through a pulmonary artery
b.a lung through a pulmonary vein
c.the heart through a pulmonary artery
d.the heart through a pulmonary vein

a lung through a pulmonary artery

The condition called thrombocytopenia is due to a deficiency of
a.vitamin K
b.platelets
c.von Willebrand factor
d.factor VII

platelets

Which of the following might be used to replace body fluid in an emergency?
a.hypotonic saline
b. hypertonic saline
c.isotonic saline
d. hypotonis glucose

isotonic saline

As a result of a blood reaction involving agglutinogens and agglutinins,
a.free hemoglobin is released into the blood
b.hemoglobin is converted into bilirubin
c.agglutinated blood cells are phagocytized
d.all of the above

all of the above

The condition call erythroblastosis fetalis is characterized by
a.leukocytosis
b.leukopenia
c.excessive mature erythrocytes
d.excessive immature erythrocytes

excessive immature erythrocytes

Erythroblastosis fetalis can be prevented by treating
a. Rh-positive mothers with Rh-posititve blood cells.
b.Rh-positive mothers with anti-Rh agllutinin
c.Rh-negative mothers with Rh-positive blood cells
d.Rh-negative mothers with anti-Rh agllutinin

Rh-negative mothers with anti-Rh agllutinin

A deficiency of folic acid and vitamin B-12 decreases RBC production by
a. decreasing the synthesis of cholesterol
b.decreasing the synthesis of carbohydrates
c.decreasing the synthesis of DNA molecules
d.causing the destruction of RBC nuclei

decreasing the synthesis of DNA molecules

Oxyhemoglobin is_________in color, whereas deoxyhemoglobin is ______ in color.
a.bright red; bluish
b.bright orange; bright red
c.purple;bluish
d.brownish;bluish

bright red; bluish

Biliverdin and bilirubin are pigments that result from the breakdown of RBCs; biliverdin is ________in color and bilirubin is _______in color.
a.greenish; purple
b.greenish; orange
c.black; red
d.brownish;orange

greenish; orange

Which of the following is/are correct concerning granulocytes?
a.contain granules in the cytoplasm
b.larger than an RBC
c.formed in the red bone marrow
d.all of the above

all of the above

Leukocytosis is an increase in WBC count above 10,000/mm blood and can occur
a. during acute infections
b.following vigorous exercise
c.during emotional distrubances
d. all of the above

all of the above

Which of the following terms is correctly defined?
a.serum is plasma minus all of its fibrinogen and other clotting factors
b.agllutinin-antibodies dissolve in plasma
c.leukocytosis-hemolytic disease of the newborn
d.agglutinogen-antigen in the red blood cell membrane

serum is plasma minus all of its fibrinogen and other clotting factors

The final formation in the formation of a blood clot is
a. the formation of prothrombin activator
b.the thrombin converts fibrinogen to fibrin
c.the prothrombin activator coverts prothrombin to thrombin
d. tissue damage

the thrombin converts fibrinogen to fibrin

Blood platelets
a.lack nuclei
b.release serotonin
c. number from 130,000-360,000/mm blood
d.all of the above

all of the above

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