Memory Cells in Secondary Immune Response

Steps:

• Memory cells form during primary immune response from activated B and T lymphocytes.
• Upon re-exposure to antigen, memory cells rapidly divide and differentiate.
• This division produces effector cells for quick antibody production.
• Plasma cells are the key effectors from B memory cells in humoral immunity.

Why B is correct:

• Plasma cells, derived from B memory cell division, secrete large quantities of antibodies, as defined in adaptive immunity processes.

Why the others are wrong:

• A. Macrophages are innate phagocytes, not produced by memory cell division.
• C. Neutrophils are short-lived innate immune cells, unrelated to memory responses.
• D. Monocytes are circulating innate cells that differentiate into macrophages, not from memory cells.

Final answer: B