Question

This is the correct statement for IgE.

• A. Inhibits the secretion of histamine and serotonin from mast cells
• B. Does not stimulate B cells
• C. Giving immune response to allergens
• D. This antibody is received from the mother to the fetus through the placenta during pregnancy

Answer 1

The Correct Option is C

The correct answer for the statement regarding IgE is (C) : Giving immune response to allergens
IgE, or Immunoglobulin E, is a type of antibody that plays a critical role in the immune system's response to allergens. When the body is exposed to certain allergens (such as pollen, pet dander, or certain foods), it triggers an immune response. During this process, B cells, a type of white blood cell, encounter the allergens and produce specific antibodies, including IgE. IgE antibodies bind to the allergens and attach to the surface of mast cells, which are a type of immune cell found in tissues throughout the body. When the same allergen is encountered again, it binds to the IgE antibodies attached to the mast cells. This triggers the release of histamine and other chemicals from the mast cells, causing the symptoms of an allergic reaction, such as sneezing, itching, hives, or even more severe reactions like anaphylaxis. The other options in the statement are incorrect: - Inhibits the secretion of histamine and serotonin from mast cells: This is not accurate. IgE actually promotes the release of histamine and other mediators from mast cells, as explained in the explanation above. - Does not stimulate B cells: This is also incorrect. IgE is produced by B cells and plays a significant role in stimulating B cells during the immune response to allergens. - This antibody is received from the mother to the fetus through the placenta during pregnancy: This statement is incorrect as well. While IgG antibodies are the main type of antibodies transferred from the mother to the fetus through the placenta, IgE is not typically transferred in significant amounts during pregnancy. IgE levels in a fetus are generally low and increase after birth as the immune system develops and the child is exposed to various allergens.