7. _ (blank) _ produce antibodies that are released into the bloodstream. Select one: a. B cells b. T cells c. Plasma cells d. Memory cells e. Mast cells   8. What is produced by white blood cells and act to stimulate other white blood cells? Select one: a. Immunoglobulins b. Histamines c. Interferons d. Interleukins e. Complements   9. An important step in the body's second line of defense is to identify the pathogen's _ (blank) _. Select one: a. Antibodies b. Histamines c. Antigens d. Cytokines e. Interferons

For an autoimmune disease to occur, lymphocytes do not learn how to recognize foreign pathogens as dangerous and self-antigens as safe. What is the second thing that needs to happen specifically with lymphocytes to have an autoimmune disease? O a. Malfunctioning lymphocytes attach to macrophages O b. Malfunctioning lymphocytes are not destroyed by the body O c. Malfunctioning lymphocytes prevent normal lymphocytes from reproducing O d. Malfunctioning lymphocytes trigger the complement system to initiate an immune response

8. Helper T cells that respond to extracellular pathogens by activating B cells are called A. antigen-presenting cells. B. cytotoxic T cells. C. Th0 cells. D. Th1 cells. E. Th2 cells.

8. Match each term with the correct definition. Each term is only used once.                                                                                                                                                                 Myeloid progenitors                                                                                                                                                                 Lymphoid progenitors                                                                                                                                                                 Monocytes                                                                                                                                                                Macrophages                                                                                                                                                                Eosinophils…

Which of the following pairs is mismatched? a. plasma cell: mediation of phagocytosis and killing of microorganisms in the plasma b. megakaryocyte: formation of platelets c. dendritic cell: activation of adaptive immune responses d. natural killer cell: develops from a common lymphoid progenitor e. neutrophil: formation of pus f. regulatory T cell: inhibition of T-cell activity.

Match the following:

The lymphatic tissues/organs illustrated below contain which of the following types of cells? 1.  reticular cells 2.  macrophages 3.  B lymphocytes 4.  T lymphocytes Choose from the following: (A) 1, 2 and 3 (B) 1, 2, and 4 (C) 2, 3, and 4 (D) 1, 3, and 4 (E) 1, 2, 3, and 4