The Switch of a B Cell from Producing One Class

question 59

Multiple Choice

The switch of a B cell from producing one class of antibody to another antibody class that is responsive to the same antigen is due to

• A)mutation in the genes of that B cell,induced by exposure to the antigen.
• B)the rearrangement of V region genes in that clone of responsive B cells.
• C)a switch in the kind of antigen-presenting cell that is involved in the immune response.
• D)a patient's reaction to the first kind of antibody made by the plasma cells.
• E)the rearrangement of immunoglobulin heavy-chain C region DNA.

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Definitions:

Amygdala

A region of the brain involved in emotional processing, including fear and pleasure.

Brain Functions

The activities and processes that the brain performs, including thought, emotion, and coordination.

Minimal Plasticity

The concept that there is a low capacity for change or adaptability in an organism's structure or function, especially referring to the brain's ability to reorganize after injury or in learning.

Work in Progress

A project or task that is still under development and has not yet been completed.