anatomy blood test
the average life span of a red blood cell is about
4 months
blood is approximately __ percent plasma by volume
46-63
a normal WBC count is about __ cells per liter
6000-9000
how long do platelets circulate before being removed by phagocytes?
9-12 days
red blood cell production is directly stimulated by
EPO
plasma proteins that are necessary for blood to maintain osmotic pressure are
albumins
__ is a condition in which the oxygen-carrying capacity of RBCs is reduced.
anemia
platelets
are a major component of the vascular clotting system
agglutinins
are antibodies that will attack surface antigens on RBCs of a different blood type
the function of a hemoglobin is to
bind and transport oxygen and carbon dioxide
platelets are
cytoplasmic fragments
drifting blood clots, air bubbles, or fat globules are called __
emboli
__ are the most abundant cell population of the formed elements of blood.
erythrocytes
the inherited condition resulting from the inadequate production of clotting factors is termed
hemophilia
hemostasis
maintenance of blood and avoidance of blood loss
thrombocytopenia is defined as a deficiency of
platelets
a person's blood type is determined by the
presence or absence of specific surface antigens on the plasma membrane
the process of blood clotting is an example of which function of blood?
restricting fluid losses at injury site
which disease is characterized by defective hemoglobin that results from a mutation affecting the amino acid sequence of one pair of the globular proteins of the hemoglobin molecule resulting in stiff, markedly curved red blood cells?
sickle cell anemia
a blood clot attached to the wall of a vessel is called a
thrombus
which of the following vitamins is needed for the formation of prothrombin and other clotting factors?
vitamin K
the term __ refers to the combination of plasma and the formed elements together.
whole blood
a hemoglobin molecule contains
four protein chains, six heme groups, and two iron ions
the primary function of white blood cells is to
help defend the body against infectious organisms
the percentage of whole blood volume occupied by cellular element is termed __
hematocrit
which organ, a primary source of plasma proteins, synthesizes more than 90 percent of such proteins?
liver
in adults, the stem cells responsible for the production of red and white blood cells originate primarily in the
red bone marrow
fresh whole blood is usually collected through a procedure called
venipuncture
three general functions of blood
transportation, protection, and regulation
