Answer to Question 1
A
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Corticotropin (ACTH) and cosyntropin are used for diagnostic purposes to test adrenal function and responsiveness. Menotropin is a purified preparation of gonadotropins and is used as a fertility drug. Thyrotropin alfa is used as adjunctive treatment for radioiodine ablation of thyroid tissue remnants in patients who have undergone a near-total to total thyroidectomy for well-differentiated thyroid cancer and who do not have evidence of metastatic thyroid cancer. Chorionic gonadotropin acts like luteinizing hormone and stimulates the production of testosterone and progesterone.
Answer to Question 2
B
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Five different types of immunoglobulins have been identified: IgA is found in tears, saliva, sweat, mucus, and bile. It is secreted by plasma cells in the GI and respiratory tracts and in epithelial cells. IgE is present in small amounts and seems to be related to allergic responses and to the activation of mast cells. The first immunoglobulin released is M (IgM); it contains the antibodies produced at the first exposure to the antigen. IgG, another form of immunoglobulin, contains antibodies made by the memory cells that circulate and enter the tissue; most of the immunoglobulin found in the serum is IgG. These antibodies react with specific pathogens that are encountered in exposed areas of the body.
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