Which cell type is targeted by the human immunodeficiency virus (HIV)?
A. Cytotoxic T-lymphocyte
B. Memory B-lymphocyte
C. Helper T-lymphocyte
D. Natural killer cell
E. Plasma cell
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Question 2) The primary goal of the immune response is
A. destruction or inactivation of pathogens and foreign material.
B. maintenance of the proper ionic balance between lymph and blood.
C. stimulation of mitotic activity in order to replace cells damaged by infection.
D. reduction of the number of circulating memory lymphocytes.
E. removal of antibodies from lymph and lymphatic organs.
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Question 3) Helper T-lymphocytes primarily contain the CD8 coreceptor.
Indicate whether this statement is true or false.
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Question 4) Once a helper T-lymphocyte recognizes an antigen, it begins the immune response by secreting chemical signals called
A. antibodies.
B. immunoglobulins.
C. memory B-lymphocytes.
D. memory T-lymphocytes.
E. cytokines.
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Question 5) Cytotoxic T-lymphocytes that have killed a foreign cell may transform into
A. memory B-lymphocytes.
B. natural killer cells.
C. plasma cells.
D. helper T-lymphocytes.
E. None of the choices is correct.
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Question 6) Which type of cell produces and secretes antibodies?
A. Memory B-lymphocyte
B. Memory T-lymphocyte
C. Natural killer cell
D. Plasma cell
E. Cytotoxic T-lymphocyte
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Question 7) Which type of cell responds to multiple antigens?
A. Memory B-lymphocyte
B. Memory T-lymphocyte
C. Natural killer cell
D. Plasma cell
E. Cytotoxic T-lymphocyte
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Question 8) Active immunity requires
A. the transfer of antibodies from another individual.
B. direct encounter with the antigen.
C. that an active virus be used in a vaccine.
D. that all immune responses to the pathogen result in symptoms of illness.
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Question 9) The main function of serous fluid is to
A. lubricate and reduce friction between pleural membranes around the lung.
B. improve adhesion of the lungs to the thoracic wall.
C. facilitate the diffusion of oxygen across the respiratory membrane.
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Question 10) Immunity can be transferred from mother to child. When the child's immunity is acquired
A.
through the placenta, it is passive immunity, but through breastmilk it is active immunity.
B.
through the placenta or through breastmilk, it is passive immunity.
C.
through the placenta or through breastmilk, it is active immunity.
D.
through the placenta, it is active immunity, but through the breastmilk it is passive immunity.
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