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What programs t cells for immunocompetence?
T cells are programmed for immunocompetence primarily in the thymus, where they undergo maturation and selection processes. During positive selection, T cells that can recognize self-MHC molecules with moderate affinity survive, while those that cannot are eliminated. Negative selection then removes T cells that bind too strongly to self-antigens, ensuring self-tolerance. This dual selection process is crucial for producing a functional T cell repertoire capable of responding effectively to pathogens while minimizing autoimmune responses.
T cells and B cells activated only by what?
T cells are activated by antigens presented on the surface of antigen-presenting cells, such as dendritic cells. B cells are activated primarily by recognizing antigens with their B cell receptor, although they may also require T cell help for full activation.
Gland that secretes a factor that causes T-cells to mature?
The thymus gland secretes thymosin, which is a hormone that plays a role in the maturation of T-cells. This maturation process is crucial for the development of functional T-cells that can effectively fight infections and regulate immune responses in the body.
B lymphocytes develop immunocompetence in the?
Directly from my anatomy and physiology book - Marieb & Hoehn Eighth Edition: "Lymphocytes originate in red bone marrow from hematopoietic stem cells." " B cells become immunocompetent and self-tolerant in the bone marrow."
How do T-Cells fight infection?
Helper T cells activate killer T cells.
What do T cells do What do b cells do?
t cells are killer cells b cells are antibodies
What are the 3types of t cells?
The three main types of T cells are: helper T cells, cytotoxic T cells, and regulatory T cells. Helper T cells assist in activating other immune cells, cytotoxic T cells directly kill infected or abnormal cells, and regulatory T cells help control the immune response to prevent excessive reactions.
What does T in T cells stand for?
The T in T-cells stands for the thymus gland. Lymphocytes produced in the bone marrow are either become B-cells or they are matured in the thymus gland and are "trained" to be either Natural Killer T-cells, CD4 (Helper T-cells), CD8 (Suppressor T-cells).
Which is only active during a specific immune responsible?
T cells apex or B cells
Are cytotoxic T cells a type of T cell clone?
Yes, cytotoxic T-cells are a subset of T-cells that in contrast to helpter T-cells express CD8.
How do killer cells work?
Killer t cells are activated by helper t cells. The Helper t cells are alerted by the macrophage that has engulfed the virus. It grows antigens to alert the helper t cells. The killer t cells are like white blood cells, there purpose is to fight pathogens.
What are the 3 types of cells that helper t cells produce upon being alarmed of an antigen?
Helper T cells can produce three types of cells when alerted to an antigen: effector T cells, memory T cells, and regulatory T cells. Effector T cells help eliminate the antigen, memory T cells remember the antigen for future responses, and regulatory T cells help regulate the immune response to prevent excessive inflammation.
