IgE antibodies play a crucial role in the allergic response by binding to mast cells and basophils. Upon subsequent exposure to an allergen, these antibodies trigger the release of histamine and other chemicals, leading to symptoms such as swelling, redness, and mucus production.

When a person is first exposed to an allergen, plasma cells produce IgE antibodies that attach to mast cells and basophils. On re-exposure to the same allergen, it binds to the IgE antibodies, causing these cells to release histamine. This release results in various allergic symptoms, including inflammation and increased mucus production, which can lead to conditions like asthma or anaphylactic shock.

Key points

IgE antibodies are produced by plasma cells during an allergic response.
They bind to mast cells and basophils, priming them for future allergen encounters.
Upon re-exposure to an allergen, IgE triggers the release of histamine.
Histamine causes symptoms like swelling, redness, and increased mucus production.

What is the role of IgE antibodies in the allergic response according to the chapter?