61) ________ is a condition in which there is an abnormal excess of erythrocytes in the blood.
62) All of the following cell types are derived from the same precursor cell that generates neutrophils except the
A) blood stem cell.
B) plasma cell.
63) The formed element that is flattened, circular, lacks a nucleus, lacks mitochondria or ribosomes, and is red because of the presence of hemoglobin is
A) an eosinophil.
B) a basophil.
C) an erythrocyte.
D) a lymphocyte.
64) Hemopoiesis is
A) different from hematopoiesis.
B) a disease of erythrocytes.
C) a stain for blood smears.
D) blood cell production.
65) The percentage of erythrocytes in a normal volume of blood is about
66) Which of the following does not remain in red bone marrow after hematopoiesis?
A) lymphoid stem cells
B) fat cells
C) myeloid stem cells
67) Which cells are the most responsible for the rejection of a transplanted organ, such as a heart?
A) B cells
D) T cells
68) An eosinophil can be distinguished from a basophil because the eosinophil
A) has a lobed (versus nonlobed) nucleus.
B) contains cytoplasmic granules.
C) has pink (versus dark purple) granules.
D) is smaller.
69) Elevated numbers of reticulocytes may indicate
A) a degenerative bone marrow disease.
B) a parasitic infection.
C) a person is adapting to life at high elevations.
D) sickle cell disease.
70) ________ is a condition in which there is an abnormally low concentration of platelets in the blood.
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