CH. 19 AP2 – Blood – Flashcards
Unlock all answers in this set
Unlock answersquestion
Plasma makes up approximately what percentage of whole blood?
answer
55 Percent
question
The following statements about blood are true EXCEPT that __________.
answer
The pH is slightly acidic
question
Plasma is closest in composition to
answer
interstitial fluid
question
Which of the following is a function of the blood?
answer
-defense against toxins and pathogens -transport of body heat -transport of nutrients and wastes -transport of gases
question
Whole blood for testing in a clinical laboratory is usually collected from
answer
a superficial vein
question
A typical adult hematocrit is
answer
45
question
The most abundant plasma protein is __________.
answer
albumin
question
Plasma proteins essential in body defense are the
answer
immunoglobulins
question
The plasma protein involved in blood clotting is
answer
fibrinogen
question
What structure binds hemoglobin molecule
answer
oxygen
question
In adults, the only site of red blood cell production, and the primary site of white blood cell formation, is the
answer
red bone marrow.
question
________ is a condition in which the oxygen-carrying capacity of the blood is reduced.
answer
anemia
question
Pernicious anemia caused by a lack of intrinsic factor is specifically treated by
answer
injections of vitamin B12.
question
Aged and damaged erythrocytes are broken down by macrophages in the
answer
spleen, liver, and bone marrow.
question
The process of red blood cell production is called
answer
erythropoiesis
question
A person with a type A positive blood can safely receive blood from all of these donors EXCEPT __________.
answer
B+
question
Antigens of the surface of red blood cells are also called ________ and antibodies in the blood plasma are also called ________.
answer
agglutinogens; agglutinins
question
Which of the following combinations may result in the hemolytic disease of the newborn?
answer
mother Rh negative, baby Rh positive
question
The white blood cell type that most rapidly increases in number after a bacterial infection is the __________.
answer
neutrophils
question
White blood cells that release histamine at the site of an injury are
answer
basophils
question
All of the following are true of neutrophils except that they are
answer
important in coagulation.
question
The blood cells involved in specific immunity are the
answer
lymphocytes
question
If a patient has thrombocytopenia, the best therapy is infusion of __________.
answer
purified platelets
question
The function of platelets is to assist in the
answer
process called hemostasis.
question
Which of these phases is NOT part of hemostasis?
answer
erythropoiesis phase
question
The common pathway in coagulation ends with __________.
answer
conversion of soluble fibrinogen to insoluble fibrin
question
The enzyme that dissolves fibrin is named __________.
answer
plasmin
question
Most of the protein factors that are required for clotting are synthesized by
answer
liver
question
The extrinsic pathway of coagulation is initiated by the
answer
release of tissue factor (Factor III) by damaged endothelium.
question
How would removal of calcium ions from a blood sample affect coagulation?
answer
Coagulation would be prevented.
question
A fibrin network that contains trapped blood cells and platelets is called a(n)
answer
blood clot.
