|
|
Immune system
If the organism is threatened by dangerous substances, such as viruses, bacteria, mushrooms or poisons, it is able to activate different defense reactions:
1. B-cell rows
the cells of the B-cell row are formed in the bone marrow, are part of the so-calledly nonspecific, humoral immune defense and form an immunoreaction's antibodies in the case so-called immunoglobulins (Ig). These antibodies are egg-white molecules in Y shape, the substances to be eliminated these at their two short arms, so-called antigens the T-Zell-row, the specific immune defense tie up be able to, around they so from, present these and them therefore harmless make " killer cells, phagocytes ". One distinguishes 4 different antibody classes:
IgG: "Standard" -- antibody of the delayed immunoreaction, i.e. be formed at first contact with a foreign substance only after relationship and identification with a certain delay. At renewed contact with the antigen then by "memory cells" production strengthened, these antibodies' possible, i.e. very rapid and strong reaction. At everyone almost all "normal" diseases and vaccinations. They often remain many years or also the whole life after the infection in the body which is thus immune to this causative agent.
IgM: Antibody of the first reaction. Relatively nonspecific antibodies which are immediately formed when the penetrating a foreign substance in large quantities to make the substance in time as short as possible as much as possible harmlessly. No memory.
IgE: Antibody for the defense of parasites and vermises. The release leads This strengthens are classic Hay fever formedly at allergic reactions of a The type 1. about fixation to mast cells (certain white blood corpuscles) to about been different the physical reactions the substance histamine, this one reaction ways messenger induces.
2. t-cell row
the cells of the T-cell row are and formed put the specific, cellular defense the organism in the thymus and lymphatic tissue of the body (e.g. lymph node). The so-called T4 helper cells which antigens bind and present and the T killer cells (phagocytes) which destroy the pests bound to T4 helper cells and therefore eliminate from the organism are part of the T-cells primarily.
3. histamine
E.g. the histamine is released at the mucosas. It is a messenger substance which plays a decisive role in the reaction chain of the allergies. Histamine is a biologically very active substance which happens in our body everywhere. E.g. each which has grasped a stinging nettle the effect of the histamine has felt sometimes. The symptoms of a "classic" allergy are triggered by histamine. Histamine and other inflammation mediators are the reason that the blood vessels widen strongly. Fluid leaves within seconds until minutes and it comes to the formation of the typical edemas and wheals. Der Blutdruck sinkt. The persons affected suffer from pruritus, red and regular nose, eye tears and dyspnea.
These informations may be considered a substitute for a piece of medical advice in no case. The content of health-illness.com doesn't can and may be put into any case to make diagnoses or carry out self medical treatment independently.
|
|
|
