Tell Me About Blood
1.) What is the significance of lower-than-normal hematocrit?
Lower-than-normal hematocrit indicates anemia. People with anemia do not have
enough hemoglobin, which is the oxygen-carrying protein in red blood cells. Iron, B12,
and folic acid deficiencies, some medications, and pregnancy can cause anemia. There
are also more serious causes such as problems with the immune system that cause
destruction of red blood cells earlier than normal, chronic diseases including kidney
disease and cancer, and problems with bone marrow found in leukemia and lymphoma
(MedlinePlus:Anemia, 2012). What is the effect of a bacterial infection on the hematocrit?
A bacterial infection, which raises white blood cell counts, may affect the
lowering it. 2.) Compare the development of lymphocytes with the development of the other formed elements.
Lymphocytes and the other formed elements are developed from pluripotent stem
The pluripotent stem cells generate myeloid stem cells and lymphoid stem cells.
Myeloid stem cells start and complete their development in red bone marrow and
rise to red blood cells, platelets, eosinophils, basophils, neutrophils, and monocytes.
Lymphoid stem cells begin development in the red bone marrow, but some are
completed in the lymphatic tissues, where they give rise to lymphocytes. The B cell
lymphocytes are began and completed in the red bone marrow and the T cell lymphocytes
begin in the red bone marrow, but they mature in the thymus (Jenkins, Kemnitz, & Tortora, 2010).
3.) What is erythropoiesis?
Erythropoiesis is the production of red blood cells or erythrocytes. It starts in the
red bone marrow with a proerythroblast. The proerythroblast divides many times and
produces cells that begin to make hemoglobin. A cell near the end of the development
cycle ejects its nucleus and then becomes a reticulocyte. Reticulocytes pass from red
bone marrow into the...
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