The composition of blood is
55% plasma, 45% formed elements
45% plasma, 55% formed elements
50% plasma, 50% formed elements
none of the above
Reduced red blood cell numbers cause
polycythemia
buffy coat
anemia
both polycythemia and anemia
Which of the following formed elements carry oxygen?
leukocytes
erythrocytes
thrombocytes
monocytes
Hematocrit and packed cell volume are synonymous terms
A reticulocyte count can indicate to a physician the rate of leukocyte formation
Oxygen deficiency increases RBCs numbers by increasing the secretion of erythropoietin by the kidneys
The life span of circulating RBCs is about 10 - 12 days
Heme is broken down into iron and amino acids for use in the synthesis of new RBCs
Plasma is a pale yellow fluid that accounts for more than half of the blood volume
Serum is whole blood minus the clotting elements
Synthesis of plasma proteins occurs in the spleen
The mature erythrocyte does not contain ribosomes, mitochondrias, and other organelles typical of most body cells
The final step in RBC formation is called erythropoiesis
A person with antibody A in his or her plasma would have which blood type
type A
type B
type AB
type O
Type AB blood is considered to be the universal recipient.
Blood does not normally contain the anti-Rh but they may appear in the blood of an Rh-negative mother during certain circumstances.
Which of the following is not a critical component of coagulation?
thrombin
fibrinolysis
fibrinogen
fibrin
For prothrombin to be synthesized by the liver, an adequate amount of which vitamin is required?
Vitamin A
Vitamin C
Vitamin D
Vitamin K
Which of the following does not hasten clotting?
rough spot in the endothelium
abnormally slow blood flow
theparin
all of the above hasten clotting
Which of the following statements does not describe a characteristic of leukocytes?
they are disc-shaped cells that do not contain a nucleus
they have the ability to fight infection
they provide defense against certain parasites
they provide immune defense
Which of the following substances is not found in serum?
clotting factors
water
hormones
all of the above are found in serum
Which of the following substances is not found in blood plasma?
oxygen
all of the above are found in blood plasma
An allergic reaction may increase the number of
eosinophils
neutrophils
lymphocytes
What is a blood clot that is moving through the body called?
embolism
fibrosis
heparin
thrombosis
What is the primary function of hemoglobin?
fight infection
produce blood clots
carry oxygen
transport hormones
Are any of the following steps not involved in blood clot formation?
A blood vessel is injured and platelet factors are formed
Thrombin is converted into prothrombin
Fibrinogen is converted into fibrin
All of the above are involved in blood clot formulation
Classification of leukocytes that contain cytoplasmic granules: ❌ Most numerous leukocytes: ❌ Granulocytes that release heparin and histamine: ❌ Granulocytes that protect against infections from parasitic worms and allergic reactions: ❌ Agranulocytes that produce antibodies: ❌ Agranulocytes that can enter tissue spaces as macrophages: ❌ Cell fragments that function in blood clotting and hemostasis: ❌ Cells from which platelets are formed: ❌ Classification of leukocytes without cytoplasmic granules: ❌ Classification of formed elements that are nucleated cells lacking hemoglobin: ❌
