Question

The type of antibodies produced during the allergic reaction

• A. Ig M
• B. Ig A
• C. Ig E
• D. Ig G

Answer 1

The Correct Option is C

During an allergic reaction, the immune system overreacts to a harmless substance, known as an allergen, such as pollen, dust mites, or certain foods. This overreaction triggers the production of IgE antibodies. These IgE antibodies are specifically designed to bind to the allergen and activate immune cells called mast cells and basophils.

When the IgE antibodies encounter the allergen again, they bind to it, leading to the release of various chemical substances, including histamine, from the mast cells and basophils. Histamine is responsible for the symptoms associated with allergies, such as itching, sneezing, runny nose, hives, and in severe cases, difficulty breathing or anaphylaxis.

It's important to note that while IgE antibodies are involved in allergic reactions, other immunoglobulins like IgG and IgA can also be produced in response to different types of immune challenges and play various roles in the immune system. However, IgE is specifically associated with allergic responses. 

Answer 2

To determine the correct answer, let's consider the role of different antibody types (immunoglobulins):

• IgM: Typically the first antibody produced during an initial immune response. It is very good at activating complement. It's less associated with allergic reactions.
• IgA: Found in mucosal areas, such as the gut, respiratory tract, and saliva, as well as in tears and breast milk. It provides protection against pathogens at these surfaces. Not directly involved in allergic reactions.
• IgE: Plays a key role in allergic reactions and parasitic infections. In allergic reactions, IgE antibodies bind to mast cells and basophils. When an allergen binds to the IgE, it triggers the release of histamine and other mediators, leading to allergy symptoms.
• IgG: The most abundant type of antibody, found in all body fluids. It provides protection against bacteria, viruses, and toxins. While IgG can be involved in some immune responses, it's not the primary antibody responsible for allergic reactions.

Therefore, the type of antibodies produced during an allergic reaction is IgE. It's IgE that triggers the release of histamine and other chemicals from mast cells and basophils, leading to allergic symptoms.