Higher B Lymphocytes vs T Lymphocytes: Detailed Roles
Part of Adaptive Immunity and Antibodies — GCSE Biology
This higher tier covers Higher B Lymphocytes vs T Lymphocytes: Detailed Roles within Adaptive Immunity and Antibodies for GCSE Biology. Specific immune responses, antibody production, lymphocytes, memory cells It is section 15 of 18 in this topic. This section is most useful once the core foundation idea is secure, because it adds the detail that pushes answers higher.
Topic position
Section 15 of 18
Practice
20 questions
Recall
25 flashcards
Higher B Lymphocytes vs T Lymphocytes: Detailed Roles
Both B and T lymphocytes are white blood cells that develop from stem cells in bone marrow, but they mature in different locations and have distinct functions:
| Feature | B Lymphocytes | T Lymphocytes |
|---|---|---|
| Maturation site | Bone marrow | Thymus |
| Main role | Produce antibodies (humoral immunity) | Kill infected cells; coordinate response (cell-mediated) |
| Activated by | Free antigens + helper T cell signals | Antigens presented by macrophages |
| Differentiates into | Plasma cells + memory B cells | Cytotoxic T cells, memory T cells, regulatory T cells |
| Target | Extracellular pathogens and toxins | Infected host cells displaying viral antigens |
HIV and T lymphocytes: HIV specifically attacks helper T cells (CD4+ T cells). As the helper T cell count falls, the immune system loses the ability to coordinate responses against pathogens or activate B cells effectively. This leads to AIDS — acquired immunodeficiency syndrome — in which the patient becomes susceptible to opportunistic infections that a healthy immune system would easily control.