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The immune system is usually non-reactive against "self" antigens under normal conditions.
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∙ 9y ago
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What is an example of a self antigen?
A or B antigens of blood cells
What typoes of cells produce antigens?
All cells produce antigens, or cell surface markers. The only question is whether the antigens are self antigens which means they belong in the body or they're foreign antigens which means they are an invading bacteria or virus (or a cancerous cell).
Where are the antigens of the ABO blood group are located?
They are found on the cell membrane of every cell, and help to distingish 'self' cells from 'non self' cells
Lack of reactivity of T cells and B cells to your own proteins is know as what?
Tolerance of self-antigens.
What is the function of MHC?
To bind to antigens for B and T cells to identify as self or foreign.
Do b cells destroy cancer cells?
No, cancer cells express self antigens, so your body cannot recognize it as foreign or dangerous.
How does a B cell tell the difference between an invader cell and a body cell?
Antigens work as bar-codes to help the immune system differentiate between body cells and pathogens. Normally the body will not attack its own cells, but is programmed to attack those with foreign antigens.
What types of antigens are recognized by B cells?
Processed fragments of protein antigens displayed on surfaces of body cells.
How does the thymus in the lymphatic system assist the immune system?
The thymus matures T lymphocytes (T cells) which identify foreign antigens. This is also where T cells that would be able to bond with self-antigens (would attack the bodies healthy cells) are weeded out and destroyed.
Which T cell inhibits the activity of other T cells?
Regulatory T cells (Treg) suppress the action of other T cells. This inhibits immune responses to self-antigens, aiming to prevent the immune system from attacking normal self cells.
What protects the body from free antigens?
The immune system protects the body from free antigens. It does so through the production of antibodies that recognize and neutralize antigens, as well as through the activation of immune cells, such as T cells and natural killer cells, that can directly destroy cells infected with antigens. Additionally, the immune system has memory cells that can recognize and respond more quickly if the same antigen is encountered again in the future.
Do cancer cells have unique antigens?
They have not
