Exam 16: Adaptive Immunity

A) The results do not provide sufficient data to draw a conclusion.
B) The child currently has influenza and has previously been exposed to RSV.
C) The child has a current RSV infection and was previously exposed to influenza.
D) The child has concurrent influenza and RSV infections.
E) The child has neither influenza nor RSV.

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A) It stimulates phagocytes.
B) It is needed for B lymphocyte activation and differentiation.
C) It ensures production of enough leukocytes.
D) Virally infected cells produce it.
E) It is a chemotactic factor for leukocytes.

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A) activates and differentiates B lymphocytes
B) ensures production of enough leukocytes
C) activates complement
D) causes basophils and eosinophils to degranulate
E) stimulates phagocytes

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A) The glycoproteins on the surface of a lymphocyte are designated with the prefix CD, for "cluster of differentiation."
B) Once they are mature, they migrate to secondary lymphoid organs.
C) B and T lymphocytes can be differentiated under the microscope.
D) Lymphocytes have different types of CD molecules in their cytoplasmic membranes.
E) Lymphocytes have integral surface proteins by which they can be recognized.

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A) clonal deletion of a T lymphocyte
B) activation of a helper T lymphocyte
C) activation of a B lymphocyte
D) activation of a cytotoxic T lymphocyte
E) clonal deletion of a B lymphocyte

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A) It is the body's ability to respond to specific invading pathogens.
B) It is the third line of defense.
C) It is acquired.
D) It has memory.
E) It changes little with repeated exposure to the same pathogen.

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A) the MALT, lymph nodes, and thymus.
B) the MALT and lymph nodes.
C) the thymus.
D) the MALT.
E) lymph nodes.

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A) artificial passive
B) natural active
C) natural passive
D) artificial active
E) both active and passive

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Antibodies act against foreign antigens ...

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A) the variable regions of the heavy chains.
B) one heavy chain.
C) portions of both of the heavy chains only.
D) the light chains only.
E) the variable regions of the light chains.

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A) They are involved in B lymphocyte activation and differentiation.
B) They ensure production of enough leukocytes.
C) They are chemotactic factors for leukocytes.
D) They are substances used to signal between leukocytes.
E) They cause basophils and eosinophils to degranulate.

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A) macrophages and neutrophils.
B) neutrophils and dendritic cells.
C) NK lymphocytes and neutrophils.
D) macrophages and eosinophils.
E) B lymphocytes and T lymphocytes.

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Antibody molecules produced by B lymphoc...

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A) They live for many years and function as memory cells.
B) They are descended from activated T cells.
C) They secrete a variety of antibody molecules specific for multiple epitopes.
D) The antibodies they produce can remain in circulation for years.
E) They can produce large quantities of antibodies on a daily basis.

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