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