What is an allergic reaction?
The allergic reaction is simply the way of the human body, how to try to fight against a foreign striker who perceives as dangerous. The allergic reaction is the reaction of the body's immune system, and although not all aspects of how exactly the allergic reaction functions are understood, the basic functions are relatively simple. Once these antigens are detected, the reaction is triggered to get out of the body as quickly as possible before it can become bad. The trick is that the body is not always so good to find out what is a dangerous attacker and what is not. When it makes a mistake and excessively response to a foreign attacker, the induced immune response is called an allergic reaction. In extreme cases, however, type I reactions can cause anaphylaxis that can lead to death. Type II reactions are also known as cytotoxic hypersensitivity and can trigger a body destroying their own cells, for example in thrombocytopenia or autoimmune hemolytic anemia. Type III reactions are often called immune complex diseases, includedThey take the reaction of Arthus and the serey disease. Type IV responses are delayed reactions and the most common reactions of type IV are contact reactions of dermatitis, such as poisonous oak or poisonous ivy.
allergic reaction can be practically anything in the world. Dust is an incredibly common soft allergic reaction, as well as pollen and many different types of food. The common causes of allergic reactions are also bee stings and bite of ants, various plants and some common medicines. In some cases, as with tree nuts or bee allergies, they may be quite serious. In these cases, the body gets into an extreme allergic reaction that can cause shock and may prove fatal.
When the body first encounters a new allergen, it triggers the type of T cell, which then leaves with interaction with B cells responsible for the production of antibodies. B cells then begin to produce an IgE antibody in large quantities. IgE then walks through the body and connects with mast cells and basophils, two types of immune cells. These cells of the newly coated IgE, which act as a kind of messenger, now know what the allergen looks like and to look for it. When the cells encounter allergens, they are now able to capture them.
At the same time, they release various mediators that cause the external effects of allergic reactions. Depending on the allergen itself, the allergic reaction may have different forms. For example, cells can release histamine, which seriously itching the skin. They can also release chemicals that cause mucus production, causing the nose to disappear. They also cause vasodilation that can cause asthma if it occurs in the lungs. After starting their course, the allergic reaction can retreat, in which case it was simply an acute reaction, or the form may change and continue like other cells such as neutrophils or macrophages, reaching allergens.