| Blood has all of the following functions EXCEPT ______________________ |
A) nutrient transport.
B) temperature regulation.
D) vitamin D production.
E) pH buffering.
|vitamin D production|
|Early in human development, the first blood cell precursors form in __________________||the yolk sac|
|A deficiency of circulating leukocytes is called ___________________________||leukemia.|
|Antibodies belong to a class of plasma proteins called ___________________________||gamma globulins|
| Which of the following is NOT a component of hemostasis? |
A) platelet plug formation
C) secretion of serotonin
D) conversion of fibrinogen to fibrin
E) secretion of platelet-derived growth factor
|Any form of anemia that results from an excessive rate of erythrocyte destruction is classified as ________________________________||hemolytic anemia.|
| Which of the following is a characteristic of mature red blood cells? |
A) They undergo mitosis.
B) They lack a nucleus.
C) They have numerous mitochondria.
D) They carry most of the carbon dioxide that is transported in the blood.
|They lack a nucleus|
| Which cell is phagocytic? |
|What is a function of eosinophils?||They destroy body cells infected with viruses.|
|What is hemophilia?||It is an hereditary clotting disorder.|
|Macrophages develop from these precursor cells||Myeloblasts|
|What would be an indication that an individual is suffering from leukemia?||Examination of the blood reveals a large number of immature leukocytes|
| Low oxygen supply, such as one encountered at high altitude, may result in which of the following conditions? |
E) hemolytic anemia
|The fluid portion of blood is called?||plasma|
|An erythrocyte is discribed as having this shape||biconcave disc shaped|
|Normally the number of red blood cells in a cubic millimeter of blood is about how many?||5,000,000|
|Normally a red blood cell (erythrocyte) is about the same size as a ______________ lumen||capillary|
|The most common white blood cell (leukocyte) at about 60% is the ______________________ .||neutrophil|
| Which of the following leukocytes is NOT classified as a granulocyte? |
|What is the name of the leukocyte, often seen in two sizes, that is described as having a small halo of cytoplasm and a round nucleus that fills the cell?||lymphocyte|
|What is the name of the leukocyte that has a clear cytoplasm and a kidney-shaped nucleus?||monocyte|
|Erythrocytes are filled with _______________||molecules of hemoglobin|
|The major function of the red blood cells is to transport __________________||Both oxygen and carbon dixoide are carried in rbc's|
|There are normally about 5 to 10 thousand _____________ per mm3 of blood.||leukocytes|
|These are cell fragments||platelets|
|These cell fragments are used to clot capillaries. What are they called?||platelets|
|The average life of a red blood cell is about _____________.||120 days|
|The least common white blood cell type found in the blood is the _____________.||basophil|
|The precursor of this cellular element is the megakaryocyte||platelets|
|Megakaryocytes are found in the _______________.||bone marrow|