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:

Intuitive

Referring to understanding or knowing something instinctively, without the need for conscious reasoning.

Strategic

refers to the careful planning and management of resources to achieve a specific goal or to gain an advantage.

Fluid Intelligence

The capacity to reason quickly and think abstractly, enabling problem solving and learning in novel situations.

Selective Optimization With Compensation

The theory, developed by Paul and Margaret Baltes, that people try to maintain a balance in their lives by looking for the best way to compensate for physical and cognitive losses, and to become more proficient in activities they can already do well.