MasteringA&P Ch 17
A typical adult hematocrit is around
45
Formed elements make up about what percentage of blood?
45 %
Type O+ blood cannot be given to a type _______ recipient.
O-
Which of the following statements concerning red blood cells is false?
Red cells are about 18 µm in diameter.
________ are immature erythrocytes that are present in the circulation.
Reticulocytes
________ involves a cascade of reactions leading to the conversion of fibrinogen to fibrin.
Coagulation
The most abundant proteins in blood plasma are
albumins
Hemolytic disease of the newborn may result if
an Rh-negative mother carries an Rh-positive fetus.
A person with Type A blood has
antigen A on the RBCs and anti-B antibodies in the plasma
Which of the following is not a phagocytic cell?
basophil
Platelets are
cytoplasmic fragments of large cells.
Platelets function in all of the following except
dissolving a formed clot.
The level of erythropoietin in the blood would rise due to all of the following except
during periods of fasting.
Red blood cell production is regulated by the hormone
erythropoietin
A plasma protein essential for blood coagulation is
fibrinogen.
A hematocrit provides information on
formed elements abundance
The waste product bilirubin is produced from
heme molecules lacking iron
More than 95 percent of the protein in a red blood cell is
hemoglobin
Which of the following descriptions best matches the term colony stimulating factor?
hormone that regulates blood cell formation
Plasma proteins essential in body defense are the
immunoglobulins
Plasma is closest in composition to
interstitial fluid.
Each heme ring in hemoglobin encloses an atom of
iron
RBCs typically live about 120 days. The main reason for this short lifespan in RBCs is their
lack of nucleus.
Megakaryocytes are precursors for which formed elements of blood?
platelets
Which of the following is not a component of plasma?
platelets
An elevated hematocrit value is termed
polycythemia.
A person's blood type is determined largely by the
presence of specific glycoproteins on the cell membrane.
Most of the iron that is removed from degraded hemoglobin is
recycled to the red bone marrow.
In adults, the only site of red blood cell production, and the primary site of white blood cell formation, is
red bone marrow
The normal pH of blood is
slightly alkaline.
Sensitization during hemolytic disease of the newborn refers to
the mother's immune system producing antibodies against the fetus' RBCs
People with type AB blood are considered the "universal recipient" for transfusions because
their blood lacks A or B antibodies.
If the blood types of a donor and recipient are compatible, then
there is no reaction between antibodies and antigens.
The conversion of fibrinogen to fibrin is catalyzed by
thrombin.
Which of the following is a function of the blood?
transport of gases, defense against toxins and pathogens, transport of body heat, transport of nutrients and wastes
Bilirubin is:
transported to the liver for excretion in the bile.
The combination of plasma and formed elements is called.
whole blood.
________ transport(s) oxygen and CO2 in the RBCs.
Hemoglobin molecules
How does a treatment with RhoGAM prevent hemolytic disease of the newborn (HDN)?
It destroys fetal RBCs that enter the maternal circulation.
When a person who lives at sea level vacations in the Rocky Mountains, you would expect
a drop in oxygen levels, the release of erythropoietin, a rise in hematocrit.
Which of the following is false concerning monocytes?
about same size as basophils
The most numerous white blood cells in peripheral circulation are the
neutrophils.
Which of the following descriptions best matches the term eosinophils?
often elevated in allergic individuals