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T cells or T lymphocytes belong to a group of White blood cells known as Lymphocytes, and play a central role in cell-meaditated immunity . They can be distinguished from other lymphocyte types, suach as B cells and natural killer cells (NK cells) by the presence of a special receptor on their cell surface called T cell receptors (TCR). The abbreviation T, in T cell, stands for thymus, since this is the principal organ responsible for the T cell's maturation. Several different subsets of T cells have been discovered, each with a distinct function.
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What are the differences between Bcell receptors and Tcell receptors?
there are different types of b cell and t cell. both are lymphocytes, a subclass of white blood cell. the t cells are mainly used in identifying antigens and releasing chemicals which attact macrophages (big immune cells which 'eat' antigens), to destroy the antigen. b cells are used in the production of antibodies. when they encounter a new antigen, plasma cells and memory cells are formed from the division of a b cell. the memory cell remembers the antigen and which antibody to use, while the plasma cell makes the antibodies to fight a particular antigen or class of antigens
What organs does a human body use to fight off infection?
The white blood cells that the body uses to fight off infections can travel all over the body via the blood and so don't require any specific organ to do most of their work. However, the immune system does have important organs. Infections are often detected in lymph nodes (for example the glands in your neck which can swell when you have a throat infection or a cold). Infection is detected in the lymph nodes and then they swell as white blood cells inside them divide and grow. In addition, the spleen is important, as a site of white blood cell production and activation. In extreme infections the spleen can become dangerously swollen (called splenomegaly, for example in mononucleosis , 'mono', which is called glandular fever in the UK). White blood cells called T cells are also produced in the thymus, an organ in the chest which is present in young people, but gets smaller and is not required in adults. Finally, the bone marrow is very important for continuously producing white blood cells which fight infections, such as neutrophils. Antibodies in our blood which protect us from infection for years or decades after vaccination, are produced by B cells which live in the bone marrow. The bone marrow is probably the only organ of the immune system which is essential throughout life, individual lymph nodes can be removed with no serious effects on the immune system, and even the spleen can be removed if necessary, although it does have other functions. The thymus is very important in young babies and children in producing a type of white blood cell called the Tcell, but as we get older, the ones we have can last a whole lifetime, so it stops producing them and shrivels. When heart surgery was first carried out, the function of the thymus was unknown, and surgeons used to remove it and throw it away! With no side effects in adult patients.
How to send free sms to Tajikistan?
if its a tcell customers then go to tcell.tj and u can send free sms to tajikistan but tcell users only
How do you raise your t cells without medication?
Take tyrosine phosphatase or eat bone marrow/bone soup/tcell cloning! MORE INFO...qORYCO@MYSPACE.COM
Hiv attacks the body's immune system by destroying what kind of cells?
Once HIV enters the body's blood stream it immediatly starts attacking the body's CD4 cells or your helper t-cells. An average HIV Negative person has roughly around 1200 tcells per every milimeter of blood. How HIV works is that once it's in the blood stream, the HIV virus is a hundred times smaller than one tcell, and the HIV virus attaches itself to the CD4 cell and it sinks into the tcell and uses the cells RNA to copy the HIV virus up to a billion times in 24 hours. But once the HIV uses the tcells RNA the tcell then become paralyzed and dies, and after HIV and destroyed so many tcells that the numbers drop below 200 tcells per milimeter of blood, the body can not naturely fight off infection, and this stage is what you call full blown AIDS.
What are superantigens and explain their role in these diseases?
superantgens are microbial and viral toxins such as staph.aurues and strpt.pyogenes that comprise a class of disease associated immunostimulatory molecules . superantigens bind to MHC II molecules and provide signal for Tcell activation , SAgs are active at very low concentration causing release of large amounts of cytokines
What do t cells do?
(t-cells) are involved in cell mediated immunity that can have memory of previous antigens(non self) that have invaded our body. cytotoxic tcells release preforin that destroy tumor cells or antigens helper tcells release cytokines/interlukins that help in more tcell differentiation
Properties of Tcell and B cell epitopes?
Properties of B cell epitopes •The size is determined by the size, shape and amino acid residue of the Ag-binding site on the Ab molecule •The binding involves weak non covalent interaction •Native proteins generally hydrophilic amino acids •Sequential or non-sequential amino acids •Located in mobile regions •Accessible Properties of T cell epitopes •T cell recognize Ag that has been processed in antigenic peptides with MHC •Antigenic peptides recognized by T cells form trimolecular complexes with a T cell receptor and MHC molecules •Internal peptides
What cells are most likely to be attacked by HIV?
helper tHuman Immunodeficiency Virus (HIV) attacks the CD4+T cells, which are basically your immune system. which prevent you from infectionsHIV or Human immunodeficiency virus does not really attack anything but aids which is the disease it leads to does. Aids attacks the immune system which causes major problems for your body. People who are HIV positive may carry the disease for years before noticing anything.
What are the differences between Bcell receptors and Tcell receptors?
there are different types of b cell and t cell. both are lymphocytes, a subclass of white blood cell. the t cells are mainly used in identifying antigens and releasing chemicals which attact macrophages (big immune cells which 'eat' antigens), to destroy the antigen. b cells are used in the production of antibodies. when they encounter a new antigen, plasma cells and memory cells are formed from the division of a b cell. the memory cell remembers the antigen and which antibody to use, while the plasma cell makes the antibodies to fight a particular antigen or class of antigens
What does your immune system do?
Aids and HIV are not the same thing though many people think they are. HIV (Human Immunodeficiency Virus) attacks your body and destroys your CD4+ cells, which are part of the bodies immune system therfore it slowly weakens your bodies immune system so it can no longer fight diseases as well as it once could. Aids is only when you have a full outbreak of HIV. I am sorry I couldn't be of more help I don't have alot of time right now to give a more discriptive answer.
What organs does a human body use to fight off infection?
The white blood cells that the body uses to fight off infections can travel all over the body via the blood and so don't require any specific organ to do most of their work. However, the immune system does have important organs. Infections are often detected in lymph nodes (for example the glands in your neck which can swell when you have a throat infection or a cold). Infection is detected in the lymph nodes and then they swell as white blood cells inside them divide and grow. In addition, the spleen is important, as a site of white blood cell production and activation. In extreme infections the spleen can become dangerously swollen (called splenomegaly, for example in mononucleosis , 'mono', which is called glandular fever in the UK). White blood cells called T cells are also produced in the thymus, an organ in the chest which is present in young people, but gets smaller and is not required in adults. Finally, the bone marrow is very important for continuously producing white blood cells which fight infections, such as neutrophils. Antibodies in our blood which protect us from infection for years or decades after vaccination, are produced by B cells which live in the bone marrow. The bone marrow is probably the only organ of the immune system which is essential throughout life, individual lymph nodes can be removed with no serious effects on the immune system, and even the spleen can be removed if necessary, although it does have other functions. The thymus is very important in young babies and children in producing a type of white blood cell called the Tcell, but as we get older, the ones we have can last a whole lifetime, so it stops producing them and shrivels. When heart surgery was first carried out, the function of the thymus was unknown, and surgeons used to remove it and throw it away! With no side effects in adult patients.
