Anatomy - MCQB Unit 3 - Ch. 20
Which of the following is not a reason for erythrocytes' flattened "doughnut" shape?
It gives them flexibility so that they can pass through the circulation more easily.
Besides transporting respiratory gases, what other functions are performed by erythrocytes?
None; transporting oxygen and carbon dioxide is their only function.
The universal donor blood type is
O
Which blood cell lacks a nucleus?
RBC
Why is oxygen able to diffuse out of the bloodstream and into the peripheral tissues passively?
There is a lower concentration of oxygen in the tissues than in the bloodstream.
Which of the following is (are) most true of leukocytes?
They are attracted to the specific chemical stimuli emitted by invading pathogens, damaged tissues, and other white blood cells.
To find out the amount of each type of leukocyte it is necessary to do
a differential count.
Which of the following are produced in the bone marrow?
a) stem cells that produce lymphocytes b) basophils c) granulocytes d) monocytes ***e) all of the above***
Surface antigens are
agglutinogens.
The class of protein involved in clotting is (the)
fibrinogens.
Plasma proteins that are important in body defense are the
immunoglobulins.
A sample of damaged tissue indicated the presence of basophils. This finding signifies that the tissue is
inflamed.
Cholesterol is a form of
lipoprotein.
Macrophages, Langerhans cells, and microglia are derived from
monocytes.
Which is the most common type of white blood cell?
neutrophil
A round cell whose nucleus resembles a string of beads is a(n)
neutrophil.
Plasma contains all of the following except
red blood cells.
Heparin is used clinically to
reduce clotting.
Platelets can initiate the clotting process by
releasing enzymes and other factors at the appropriate times.
Slightly less than one percent of the RBC population are (the)
reticulocytes.
If body tissues are damaged, blood loss tends to be minimized by all of the following mechanisms except
the injured tissues release hemoglobin
Which of the following would be classified as hypovolemic for the average adult male?
3 liters
Which of the following statements is true?
All lymphocytes are leukocytes.
______ exists when the oxygen-carrying capacity of the blood is reduced.
Anemia
Rhogam is used to prevent
Rh- incompatibility.
When an agglutinin meets its specific agglutinogen, what will occur?
The blood cells will clump together in a process called agglutination. and A cross-reaction will occur.
Compared to water, whole blood is
a) about five times more viscous. b) sticky. c) resistant to flow. d) cohesive. ***e) all of the above.***
Development of lymphocytes involves (the)
a) colony-stimulating factors. b) bone marrow. c) lymph nodes. d) thymus. ***e) all of the above.***
Blood cells that appear to be too large are referred to as
a) lymphocytic. b) normocytic. c) microcytic. d) macrocytic. ***e) none of the above.***
Megakaryocytes produce
a) proteins. b) enzymes. c) membranes. d) platelets. ***e) all of the above.***
Anemia caused by lack of bone marrow activity is called
aplastic anemia.
Eosinophils
are an important component of the immune response.
Lymphocytes
are the primary cells of the lymphatic system. and are responsible for specific immunity.
What blood cell type is activated in response to a damaged blood vessel?
basophils
The white blood cells that contain granules with histamine are called
basophils.
Which of the following lab values is in the normal range for adults?
blood temperature about 100 →100.5 degrees
The process of moving toward an area due to chemical signals is called
chemotaxis.
To what type of tissue does blood belong?
connective tissue
A low white cell count could cause all of the following problems except
diminished transport of oxygen and carbon dioxide.
Composition of the plasma and the interstitial fluid differs chiefly in the concentration of
dissolved oxygen and carbon dioxide.
A round cell with distinct bright orange-red granules is called a(n)
eosinophil.
What formed element in the blood is flattened and circular, lacks a nucleus, mitochondria, and ribosomes, and is red in color because of the presence of hemoglobin?
erythrocyte
The molecule that binds oxygen contains globin proteins with four attached
heme groups.
A condition related to the insufficient production of clotting factors is known as
hemophilia.
A cell that is only slightly larger than an RBC, and contains a relatively large round nucleus and very little cytoplasm, is a(n)
lymphocyte.
Progenitor cells form
only specific types of blood cells.
An abnormal condition in which lipids accumulate in the blood vessel walls, blocking blood flow, is called a(n)
plaque.
The major differences between plasma and interstitial fluid include
plasma oxygen levels are higher than those of interstitial fluid. and plasma has a much higher protein concentration.
Formed elements of the blood include all of the following except
plasma proteins.
An elevated hematocrit constitutes what condition?
polycythemia
The blood type of an individual is determined at the cellular level by
the presence or absence of specific components in the erythrocyte cell membranes.
Blood assists in directly defending the body against toxins and pathogens by
transporting white blood cells to injury or infection sites.
