All Entries in the "Allergy" Category
body tempature
why is my body tempature lower than normal it has been running at 95.3?…
ovarian cancer
is the likelyhood of getting ovarian cancer still just as possible if you have had a hysterectomy years ago due to fibroids and obviously no longer have a womb or a cervix but had your ovaries left??…
What are mast cells?
Mast cells are tissue cells. They are found in every tissue throughout the body, but they are most heavily concentrated in the skin, the lining of the nose and lungs and the gastrointestinal tractareas often affected by allergy. Each of these cells is capable of hosting thousands of IgE antibodies.
What actually happens during an allergic reaction?
The actual symptoms of an allergic reaction vary depending on the number of IgE antibodies in the body, where the mediators are released and other factors. But the mechanics are essentially the same.
Do other white blood cells also release mediators?
Yes. Several other white blood cells act by releasing mediators into tissue and the bloodstream. These specialized white blood cells include neutrophils, eosinophils and basophils. The first two can also function as phagocytes, which as you remember ingestand thus destroyinvading …
Does lymphokines themactually trigger Allergy attack?
Yes. A number of chemicals are crucial to the function of the immune system. These chemicals, which are released from cells when an antigen meets up with antibodies or T cells, mediate, or act on, other elements of the immune …
What happens after the antibodies attach to immune cells?
The antibodies simply stay there, ready to spring to the body’s defense the next time it comes in contact with the allergen. When enough antibodies are present on these cellswhen the person becomes sensitized to the allergensubsequent contact with the …
What T cells do?
T cells, which are processed in the thymus (hence their name), initiate, direct and terminate a type of immune response known as cell-mediated immunity. When T cells encounter an antigen, they divide rapidly and produce large numbers of new T …
How exactly B lymphocytes cells do defence?
When a foreign substance enters the body, the B cells are activated. They recognize the substance as foreign, multiply, then differentiate into plasma cells and memory cells. The plasma cells produce proteins known as antibodies, which attach to the substance and neutralize it, much in the way an acid neutralizes a base in a chemistry lab experiment. Foreign substances that can cause the body to produce antibodies are known as antigens.
What do B cells or B lymphocytes do?
B cells identify potentially harmful foreign substances, then work to neutralize them, or render them harmless.