hese are the most abundant leukocyte; they are formed in the bone marrow.
52) Cytotoxic, these cells are associated with allergic reactions and parasitic infestations. Usually these cells are less than 3% of the leukocyte population, and only live up to 12 hours.
53) Precursors of macrophages, these cells are relatively rare in blood because they are actually in transit to some other site.
54) These cells are related to mast cells, and both release chemical mediators such as histamine and heparin, which aid in the immune response.
55) Estimated to reach populations of one trillion in normal adults, most of these cells reside in the lymphoid tissues of the body. These cells look quite similar to one another under the microscope, yet function very differently.
56) A patient has elevated eosinophils and monocytes but normal levels of neutrophils, basophils, and lymphocytes. Which of the following could be causing those levels?
A) an acute bacterial infection
B) a chronic bacterial infection
C) a viral infection
D) a chronic parasitic infection
E) a severe allergic reaction
57) A patient has elevated neutrophils and monocytes with normal levels of basophils, eosinophils, and lymphocytes. Which of the following is the most likely cause of these test results?
A) a chronic bacterial infection
B) an acute viral infection
C) an allergic reaction
D) a fungal infection
E) an autoimmune reaction
58) A patient with hay fever symptoms that have been going on for a couple weeks comes to your office to be treated for his hay fever. If a white blood cell differential count was performed, which leukocytes would likely be elevated?
A) neutrophils, monocytes, and lymphocytes
B) monocytes, lymphocytes, and eosinophils
C) monocytes, eosinophils, and basophils
D) lymphocytes, basophils, and neutrophils
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