A 37-year-old woman is being treated aggressively with a chemotherapeutic regimen to fight breast cancer. As a result of this regimen, she has an inability to fight infection due to the fact her bone marrow is unable to produce a sufficient amount of:
A) Lymphocytes
B) Cytoblasts
C) Antibodies
D) Capillaries
Ans: A
Feedback: The white blood cells (WBCs) involved in immunity are produced in the bone marrow. Like other blood cells, lymphocytes are generated from stem cells, which are undifferentiated cells. Descendants of stem cells become lymphocytes, B lymphocytes, and T lymphocytes. B lymphocytes mature in the bone marrow and then enter the circulation. T lymphocytes move from the bone marrow to the thymus, where they mature into several kinds of cells with different functions. Cytoblasts are the protoplasm of the cell outside the nucleus. Capillaries are small blood vessels. Antibodies are protein substances that respond in the presence of an antigen. Antibodies are found in normal circulation.
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