44 terms


The percentage of solids in a sample of human blood is normally abount
The biconcave cells in blood that lack nuclei when they are mature are the
a. white blood cells
b.red blood cells
red blood cells
Wich of the following is an agranulocyte?
d.polymorphonuclear leukocyte
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
d.all of the above
all of the above
As a platelet plug forms, platelets release the vasoconstricting substances called
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
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?
Of the following, which are most active as phagocytes?
Which of the following is not needed for the formation of a blood clot?
Agglutinogens of the various blood types are examples of
b.white blood cells
d.none of the above
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
The condition called cyanosis is caused by a decreased blood concentration of
c.carbon dioxide
d.carbon monoxide
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
c.physiologic jaundice
d.pernicious anemia
physiologic jaundice
Vitamin B-2 is poorly absorbed in the absence of
a.folic acid
c.Intrinsic factor
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
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
c.von Willebrand factor
d.factor VII
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
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
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
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