The antibody-secreting progeny of an activated B cell are called:

• A. Antibodies.
• B. Sensitized T cells.
• C. Activated macrophages.
• D. Plasma cells.

Answer: (D)

Verified step by step guidance

1. Understand the role of B cells in the immune system: B cells are a type of white blood cell that play a crucial role in the adaptive immune response. They are responsible for producing antibodies that help neutralize pathogens.
2. Learn about the activation of B cells: When a B cell encounters its specific antigen, it becomes activated. This activation is often aided by helper T cells and involves the B cell receptor (BCR) recognizing the antigen.
3. Explore the differentiation process: Once activated, B cells undergo a process called differentiation. During this process, they can become either memory B cells or antibody-secreting cells.
4. Identify the antibody-secreting cells: The cells that are responsible for secreting antibodies are known as plasma cells. These are the effector B cells that produce large quantities of antibodies to help eliminate the antigen.
5. Distinguish plasma cells from other immune cells: Unlike sensitized T cells or activated macrophages, plasma cells are specifically derived from B cells and are specialized for antibody production.