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What is lymphocytes contained in the thymus gland that acts on antigens?
T cells are the lymphocytes contained in the thymus gland that act on antigens. They undergo maturation and selection processes in the thymus to ensure they can recognize and respond to specific antigens. These T cells play a crucial role in the immune response by recognizing and attacking cells infected with pathogens.
What does not respond to cell-mediated immunity?
Non-living things such as toxins, chemicals, and drugs do not respond to cell-mediated immunity since they do not have cells or antigens that can be recognized and targeted by the immune system's T cells.
Do antibodies attack extracellular or intracellular antigens?
Antibodies primarily target extracellular antigens, which are found outside of cells. These antigens can be on the surface of pathogens or released into the extracellular environment. Intracellular antigens, located inside cells, are primarily targeted by T cells of the immune system.
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.
How is it possible to determine blood types from other body cells such as cheek cells or skin cells?
Blood type is determined by the presence or absence of specific antigens on red blood cells. These antigens are not only present on red blood cells but also on other body cells, including cheek cells and skin cells. By analyzing the presence of these antigens on these cells, blood type can be determined.
Which cells exhibit clonal diversity?
Cells of the immune system, such as B cells and T cells, exhibit clonal diversity. They undergo rearrangement of their antigen receptor genes to generate a diverse repertoire of cells capable of recognizing a wide range of antigens. This clonal diversity allows the immune system to respond to a variety of pathogens and antigens.
Do T- Cells respond to antigens by becoming plasma cells?
No. B-Cells do.
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 t cells respond to antigens by secreting complements?
No, T cells respond to antigens by directly destroying infected cells or by producing cytokines to help coordinate the immune response. Complements are a group of proteins that are part of the innate immune response and are mainly secreted by macrophages and other immune cells to help enhance the immune response.
What is lymphocytes contained in the thymus gland that acts on antigens?
T cells are the lymphocytes contained in the thymus gland that act on antigens. They undergo maturation and selection processes in the thymus to ensure they can recognize and respond to specific antigens. These T cells play a crucial role in the immune response by recognizing and attacking cells infected with pathogens.
What does not respond to cell-mediated immunity?
Non-living things such as toxins, chemicals, and drugs do not respond to cell-mediated immunity since they do not have cells or antigens that can be recognized and targeted by the immune system's T cells.
When the immune system does not respond to a particular antigen?
Tolerance exists when the immune system does not respond to a particular antigen. All cells and tissues in the body contain antigens that normally do not stimulate an immune response. The immune system is said to exhibit tolerance toward such antigens.
What types of antigens are recognized by B cells?
Processed fragments of protein antigens displayed on surfaces of body 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).
Do antibodies attack extracellular or intracellular antigens?
Antibodies primarily target extracellular antigens, which are found outside of cells. These antigens can be on the surface of pathogens or released into the extracellular environment. Intracellular antigens, located inside cells, are primarily targeted by T cells of the immune system.
Why do T cells mature in thymus?
T cells mature in the thymus to ensure they develop properly and can effectively recognize and respond to pathogens while distinguishing between self and non-self cells. This maturation process includes positive and negative selection, where T cells that can recognize self-antigens are eliminated to prevent autoimmune reactions, while those that can respond to foreign antigens are allowed to survive. The thymus provides an ideal microenvironment and necessary signaling molecules for this crucial maturation process.
Do cancer cells have unique antigens?
They have not
