BIO 124 Chapter 1 UPDATED ACTUAL
Exam Questions and CORRECT Answers
Hematology - CORRECT ANSWER - the study of blood and its related disorders
Discovered hematology by noting cells in the blood - CORRECT ANSWER - Anton van
Leeuwenhoek
Average blood volume in an adult - CORRECT ANSWER - 4-6L (Women 4-5L, Men 5-
6L)
Blood volume is what percent of the total body weight? - CORRECT ANSWER - 8%
Blood is composed of what percent plasma and formed elements? - CORRECT
ANSWER - 55% plasma, 45% formed elements (cells) (44% is RBCs, 1% is WBCs and
platelets)
Of the cellular components of blood what percent are RBCs, WBCs and platelets? - CORRECT
ANSWER - 44% RBCs, 1% WBCs and platelets
Plasma is composed of what percent water and solutes? - CORRECT ANSWER - 91.5%
water, 8.5% solutes
Primary step in assessing hematologic function and the presence of disease - CORRECT
ANSWER - Examination of cellular components like through a blood smear
Blood cells normally present on a blood smear - CORRECT ANSWER - RBCs
(erythrocytes), WBC (leukocytes) and platelets (thrombocytes)
, Leukocytes - CORRECT ANSWER - All white blood cells are nucleated but are otherwise
distinct in form and function. White cells are best classified into two major lineages: the myeloid
leukocytes and the lymphocytes
The white cells of the myeloid lineage include neutrophils, monocytes, eosinophils and
basophils.
Lymphocytes include T cells, B cells and natural killer cells.
Leukocytes are grouped under two major classifications - CORRECT ANSWER -
granulocytes (with granules) and agranulocytes (without granules)
Morphology of erythrocytes (RBCs) - CORRECT ANSWER - Plasma membrane
surrounding a soln of proteins (hemoglobin) and electrolytes
Biconcave disc that is 7-8 µm in diameter and 1.5-2.5 µm thick
Mean volume of 90 fL
Under Wright's stain they appear as a circular cell with distinct, smooth margins and pink hue w/
an area of central pallor. Uniform in size and relatively round in shape, NO nucleus
Wright stain - CORRECT ANSWER - Erythrocyte appears as a circular cell with distinct,
smooth margins and pink hue w/ an area of central pallor. Uniform in size and relatively round in
shape, NO nucleus
Morphology of platelets (Thrombocytes) - CORRECT ANSWER - 1-4 µm in diameter and
vary in shape. 7-15 per oil immersion field. An estimate should be made from 10 oil immersion
fields. They may be observed in small groups but platelets should be counted individually.
In Wright's stain a platelet contains reddish-purple granules in a small amount of bluish
cytoplasm, NO nuclues. Platelets contain molecules needed for hemostasis and allow them to
adhere, aggregate and allow for coagulation.
Exam Questions and CORRECT Answers
Hematology - CORRECT ANSWER - the study of blood and its related disorders
Discovered hematology by noting cells in the blood - CORRECT ANSWER - Anton van
Leeuwenhoek
Average blood volume in an adult - CORRECT ANSWER - 4-6L (Women 4-5L, Men 5-
6L)
Blood volume is what percent of the total body weight? - CORRECT ANSWER - 8%
Blood is composed of what percent plasma and formed elements? - CORRECT
ANSWER - 55% plasma, 45% formed elements (cells) (44% is RBCs, 1% is WBCs and
platelets)
Of the cellular components of blood what percent are RBCs, WBCs and platelets? - CORRECT
ANSWER - 44% RBCs, 1% WBCs and platelets
Plasma is composed of what percent water and solutes? - CORRECT ANSWER - 91.5%
water, 8.5% solutes
Primary step in assessing hematologic function and the presence of disease - CORRECT
ANSWER - Examination of cellular components like through a blood smear
Blood cells normally present on a blood smear - CORRECT ANSWER - RBCs
(erythrocytes), WBC (leukocytes) and platelets (thrombocytes)
, Leukocytes - CORRECT ANSWER - All white blood cells are nucleated but are otherwise
distinct in form and function. White cells are best classified into two major lineages: the myeloid
leukocytes and the lymphocytes
The white cells of the myeloid lineage include neutrophils, monocytes, eosinophils and
basophils.
Lymphocytes include T cells, B cells and natural killer cells.
Leukocytes are grouped under two major classifications - CORRECT ANSWER -
granulocytes (with granules) and agranulocytes (without granules)
Morphology of erythrocytes (RBCs) - CORRECT ANSWER - Plasma membrane
surrounding a soln of proteins (hemoglobin) and electrolytes
Biconcave disc that is 7-8 µm in diameter and 1.5-2.5 µm thick
Mean volume of 90 fL
Under Wright's stain they appear as a circular cell with distinct, smooth margins and pink hue w/
an area of central pallor. Uniform in size and relatively round in shape, NO nucleus
Wright stain - CORRECT ANSWER - Erythrocyte appears as a circular cell with distinct,
smooth margins and pink hue w/ an area of central pallor. Uniform in size and relatively round in
shape, NO nucleus
Morphology of platelets (Thrombocytes) - CORRECT ANSWER - 1-4 µm in diameter and
vary in shape. 7-15 per oil immersion field. An estimate should be made from 10 oil immersion
fields. They may be observed in small groups but platelets should be counted individually.
In Wright's stain a platelet contains reddish-purple granules in a small amount of bluish
cytoplasm, NO nuclues. Platelets contain molecules needed for hemostasis and allow them to
adhere, aggregate and allow for coagulation.
