Platelets are pinched off from giant multinucleated cells in the bone marrow called
erythroblasts.
normoblasts.
lymphoblasts.
megakaryocytes.
myeloblasts.
answer
megakaryocytes
question
Formed elements make up about what percentage of blood?
45 percent
55 percent
78 percent
60 percent
20 percent
answer
45 percent
question
Which of the following is false concerning monocytes?
are long-lived
about same size as basophils
become macrophages
can phagocytize bacteria
enter tissues and wander
answer
about same size as basophils
question
Platelets function in all of the following except
releasing chemicals that stimulate clotting.
initiating the clotting process.
forming temporary clump in injured areas.
dissolving a formed clot.
contracting after clot formation.
answer
dissolving a formed clot
question
All of the following blood diseases are caused by pathogens except
viremia.
hemophilia.
septicemia.
malaria.
bacteremia.
answer
hemophilia
question
Eileen is a strict vegan and therefore eats no animal products. She develops an anemia that her doctor thinks is caused by a nutritional deficiency. Which of the following is the likeliest candidate?
vitamin B12 deficiency
vitamin B6 deficiency
iron deficiency
vitamin K deficiency
lack of intrinsic factor
answer
vitamin B12 deficiency
question
All of the following are heritable blood disorders except
sickle cell anemia.
sickle cell disease.
malaria.
hemophilia.
thalassemia.
answer
malaria
question
All of the following are true of neutrophils except that they are
active in fighting bacterial infections.
important in coagulation.
granular leukocytes.
phagocytic.
round cells with lobed nuclei.
answer
important in coagulation.
question
How would removal of calcium ions from a blood sample affect coagulation?
There would be no effect because calcium is not a necessary cofactor in coagulation.
Coagulation would be prevented.
There would be no effect because magnesium can substitute for calcium.
The coagulation pathway would be lacking a required cofactor at many steps.
The coagulation pathway would be lacking a required cofactor at many steps and coagulation would be prevented.
answer
The coagulation pathway would be lacking a required cofactor at many steps and coagulation would be prevented.
question
All of the following are components of the cardiovascular system except
heart.
capillaries.
arteries.
lymph vessels.
blood.
answer
lymph vessels
question
Hematology can detect all of the following except
anemia.
diminished erythropoiesis.
body temperature.
clotting disorders.
infection.
answer
body temperature
question
The process of fibrinolysis
activates fibrinogen.
dissolves clots.
draws torn edges of damaged tissue closer together.
forms thrombi.
forms emboli.
answer
dissolves clots
question
________ is a condition in which the oxygen-carrying capacity of the blood is reduced.
Leukopenia
Polycythemia
Leukemia
Anemia
Thrombocytopenia
answer
anemia
question
Each hemoglobin molecule contains
two heme groups.
four iron ions.
one alpha and one beta chain.
four alpha chains.
one heme group.
answer
four iron ions
question
An obstruction in blood flow to the kidneys would ultimately result in
decreased erythropoiesis.
increased erythropoiesis.
renal anemia.
increased sensitivity to vitamin K.
decreased iron absorption.
answer
increased erythropoiesis
question
The ________ is a procedure that is used to determine the number of mature erythrocytes.
differential count
reticulocyte count
RBC count
complete blood count
platelet count
answer
RBC count
question
People with type AB blood are considered the "universal recipient" for transfusions because
their blood lacks A or B antibodies.
they are usually Rh negative.
their blood is plentiful in A and B antibodies.
they usually have very strong immune systems.
their blood cells lack A and B antigens.
answer
their blood lacks A or B antibodies.
question
White blood cells that release histamine at the site of an injury are
eosinophils.
monocytes.
neutrophils.
basophils.
lymphocytes.
answer
basophils
question
The most numerous white blood cells in peripheral circulation are the
monocytes.
eosinophils.
neutrophils.
basophils.
lymphocytes.
answer
neutrophils
question
A person's blood type is determined largely by the
shape of the RBCs.
chemical character of the hemoglobin.
size of the RBCs.
volume of the RBCs.
presence of specific glycoproteins on the cell membrane.
answer
presence of specific glycoproteins on the cell membrane.
question
A person with Type A blood has
anti-B antibodies in the plasma and anti-A antibodies on the red blood cells.
antigen A on the RBCs.
anti-B antibodies in the plasma.
antigen A on the RBCs and anti-B antibodies in the plasma.
anti-A antibodies on the red blood cells.
answer
antigen A on the RBCs and anti-B antibodies in the plasma.
question
In adults, the only site of red blood cell production and the primary site of white blood cell formation is
the spleen.
the thymus.
the liver.
yellow bone marrow.
red bone marrow.
answer
red bone marrow
question
Which of the following is not true of basophils?
promote inflammation
increased production during parasitic infections
granules contain histamine
contain dense blue stained granules in the Wright stain
constitute about 1 percent of WBCs
answer
increased production during parasitic infections
question
Most of the protein factors that are required for clotting are synthesized by
the spleen.
the kidneys.
megakaryocytes.
platelets.
the liver.
answer
the liver
question
Which of the following proteins functions to store or transport oxygen?
immunoglobulin
hemoglobin
albumin
transferrin
All of the answers are correct.
answer
hemoglobin
question
The conversion of fibrinogen to fibrin is catalyzed by
thrombin.
plasmin.
fibrinogen-converting enzyme.
factor VIII.
prothrombin activator.
answer
thrombin
question
The process of white blood cell production and maturation goes on in all of the following except
the lymph nodes.
the thymus.
the kidney.
red bone marrow.
the spleen.
answer
the kidney
question
The disease sickle cell anemia is an example of what can happen if
red blood cells bind too much oxygen.
a gene for adult hemoglobin is abnormal.
hemolysis is prevented by a bad gene.
the diet is deficient in iron.
there is insufficient heme in the hemoglobin.
answer
a gene for adult hemoglobin is abnormal.
question
Pernicious anemia caused by a lack of intrinsic factor is specifically treated by
oral doses of iron.
injections of Vitamin K.
injections of vitamin B12.
injections of clotting factors.
injections of iron.
answer
injections of vitamin B12.
question
________ transport(s) oxygen and CO2 in the RBCs.
Ribosomes
Mitochondria
Hemoglobin molecules
Components of the cytoskeleton
DNA
answer
Hemoglobin molecules
question
Aged and damaged erythrocytes are broken down by macrophages in all of the following places except the
spleen.
kidney.
liver.
bone marrow.
None of the answers is correct.
answer
kidney
question
Which of the following descriptions best matches the term eosinophils?
release histamine
defend against specific pathogens or toxins and produce antibodies in response to antigens
kill bacteria using cytotoxic chemicals
become macrophages
often elevated in allergic individuals
answer
often elevated in allergic individuals
question
The combination of plasma and formed elements is called
whole blood.
packed blood.
serum.
extracellular fluid.
lymph.
answer
whole blood
question
Granulocytes form in
yellow bone marrow.
the intestines.
the spleen.
red bone marrow.
the thymus.
answer
red bone marrow
question
Which of the following statements about blood is false?
It contains buffers that control pH.
It is more viscous than water.
It is about 55 percent plasma.
Normal pH is 6.8 to 7.0.
None of the statements are false; all are true.
answer
Normal pH is 6.8 to 7.0.
question
RBCs typically live about 120 days. The main reason for this short lifespan in RBCs is their
flexibility.
lack of nucleus.
cell shape.
large surface area-to-volume ratio.
concentration of Hb.
answer
lack of nucleus
question
Which of these descriptions best matches the term lymphocytes?
kill bacteria using cytotoxic chemicals
become macrophages
often elevated in allergic individuals
release histamine
defend against specific pathogens or toxins
answer
defend against specific pathogens or toxins
question
In adults, erythropoiesis exclusively takes place in
the spleen.
lymphoid tissue.
the liver.
yellow bone marrow.
red bone marrow.
answer
red bone marrow
question
Which of the following vitamins is needed for the formation of clotting factors?
A
B
K
D
E
answer
K
question
If bile ducts are blocked, which of the following would not occur?
less hemolysis would occur
bilirubin appears in the skin
increased jaundice
yellow color of the sclera
more bilirubin appears in the plasma
answer
increased jaundice
question
________ involves a cascade of reactions leading to the conversion of fibrinogen to fibrin.
Vascular spasm
Coagulation
Fibrinolysis
The platelet phase
Retraction
answer
coagulation
question
The function of hemoglobin is to
produce antibodies.
aid in the process of blood clotting.
defend against bacterial infection.
distribute nutrients.
carry oxygen.
answer
carry oxygen
question
Red blood cell production is regulated by the hormone ________ which is mostly produced in the ________.
renin; kidneys
thymosin; thymus
erythropoietin; liver
erythropoietin; kidneys
angiotensin; lungs
answer
erythropoietin; kidneys
question
An elevated hematocrit value is termed
anemia.
hyperchromic.
reticulocytosis.
polycythemia.
macrocytic.
answer
polycythemia
question
Hemolytic disease of the newborn may result if
the mother is Rh positive and the father is Rh negative.
both the father and the mother are Rh negative.
both the father and the mother are Rh positive.
an Rh-negative mother carries an Rh-positive fetus.
an Rh-positive mother carries an Rh-negative fetus.
answer
an Rh-negative mother carries an Rh-positive fetus.
question
When a person who lives at sea level vacations in the Rocky Mountains, you would expect
a drop in oxygen levels.
a rise in hematocrit.
the release of erythropoietin.
All of the answers are correct.
None of the answers is correct.
answer
All of the answers are correct.
question
Plasma composes about ________ percent of whole blood, and water composes ________ percent of the plasma volume.
45; 55
92; 7
92; 55
50; 50
55; 92
answer
55; 92
question
Which blood type contains RBCs with surface antigen B only and plasma that contains only anti-A antibodies?
type O
type B
type AB
type A
answer
type B
question
The waste product bilirubin is produced from
globin chains of hemoglobin.
heme molecules lacking iron.
heme molecules plus iron.
iron found in hemoglobin molecules.
abnormal proteins found in red blood cells.
answer
heme molecules lacking iron
question
Which of the following statements concerning red blood cells is false?
Red cells lack mitochondria.
Red cells are specialized for carrying oxygen.
Red cells can form stacks called rouleaux.
Red cells are about 18 µm in diameter.
Red cells are biconcave discs.
answer
Red cells are about 18 µm in diameter.
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