1. Lack of reaction to our own human leukocyte antigens (HLAs) is known as?
A.autoimmunity
B.complement system
C.clonal selection
D.tolerance

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2. Which of the following components of the vertebrate immune response occurs first upon invasion by a virus or bacterium?
A.Activation of killer T lymphocytes
B.Activation of B lymphocytes
C.The inflammatory response
D.Mobilization of complement proteins

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3. Which of the following white blood cells act as scavengers when they engulf and digest pathogens?
A.Macrophages
B.T cells
C.B cells
D.Lymphocytes

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4. A cell which defends against body cells in which viruses are reproducing is
A.Exotoxin
B.Cytotoxic T cell
C.Endotoxin
D.Suppressor T cell

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5. Which of the following is most likely to produce anaphylaxis in a susceptible individual?
A.Pollen
B.Mold
C.Dust
D.Bee sting

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6. What type of B cell remains dormant in the body, but can respond rapidly if the same antigen appears again?
A.T cells
B.Memory cells
C.Plasma cells
D.Macrophages

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7. The maturation of T cells and the production of particular T cell receptors occurs in the
A.thyroid gland
B.thymus gland
C.testes
D.all of these

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