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adult hemoglobin

hemoglobin A


the condition in which there is a deficiency in the ammount of hemoglobin in the blood, thus reducing the oxygen-carrying capacity of the blood.

buffy coat

the 0.5 to 1.0 mm thick, whitish tan layer of white blood cells and platelets that forms between the packed red cellsand plasma when whole blood is centrifuged.


the presence of carotene in the blood.

complete blood count (CBC)

a battery of hemotologist test often requisitioned in POLs. It includes hemoglobin concentration, hematocrit, red and white blood cell counts, differential white blood cell counts, and sometimes erythrocyte indices.


a red blood cell.


the formation of red blood cells.


the kidney hormone that triggers red blood cell formation. It is produced whenever hemoglobin concentration or oxygen saturation declines.

fetal hemoglobin

hemoglobin F

henatocrit (Hct or crit)

the volume of red blood cells packed by centrifugation in a given volume of blood. It is given as a percent.


the study of blood and blood forming tissues.

hematology test

a blood test, including hematocrit, hemoglobin concentration, and red and white blood cell counts, among others.

hemoglobin A

the normal adult hemoglobin. It develops by 6 months of age to replace hemoglobin F, or fetal hemoglobin.

hemoglobin C

an abnormal hemoglobin that is more prevalent in African Americans. It causes chronic hemolytic anemia, splenomegaly, arthralgia, and abdominal pain.

hemoglobin E

an abnormal hemoglobin that is prevalent in India, Southeast Asia, and Southeast Asian immigrants in the United States. It causes a mild form of hemolytic anemia.

hemoglobin F

fetal hemoglobin. This hemoglobin is found in fetuses and infants until 6 months of age. It is replaced by hemoglobin A, or adult hemoglobin.

hemoglobin S

sickle-cell hemoglobin.

hemoglobin S-C disease

the disease in individuals heterozygous for hemoglobins S and C. The symptoms which usually apper after the age of 40, include hematuria and pain in the bones, joints, abdomen, and chest.


any disease caused by abnormal hemoglobin.

hemolytic anemia

the anemia that is due to the breakdown of red blood cells.


the destruction of red blood cells, which release the hemoglobin.


pertaining to the inheritance of different forms of a gene from each parent.


pertaining to the inheritance of the same form of a gene from each parent.


the presence of a high level of billirubin in the blood.

iron-deficiency anemia

the anemia resulting from lack of or the inability to utilize available iron in the body.


a disease characterized by unrestrained production of white blood cells.


the presence of an abnormal amount of fat in the blood.


to break down a formed substance, such as red blood cells.


a method of determining the hematocrit. It uses just two or three drops of blood collected in a capillary tube.

sickle-cell anemia

a life threatening disease that occurs in individuals homozygous for the sickle-cell hemoglobin gene.

sickle-cell hemoglobin

the most common type of abnormal hemoglobin in the United States. It is found primarily in African Americans. Sickle-cell hemoglobin is so named because it causes red blood cells to become sickle shaped under conditions of low oxygen tension, thus producing sickle-cell anemia


the enlargement of the spleen, Splenomegaly is due to abnormal hemoglobin, among other possible causes.

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