B. allergies occur when people are exposed to substances that their bodies are sensitive to.
What happens to the immune system when a person is exposed to allergies?
The immune system overreacts by producing an antibody called immunoglobulin E (IgE). These antibodies migrate to the cells, which release chemicals and cause an allergic reaction. This reaction usually causes symptoms in the nose, lungs, throat, sinuses, ears, lining of the stomach, or skin.
Allergies occur when the immune system reacts to foreign substances such as pollen, bee venom, animal scales, or foods that do not cause a reaction in most people. Your immune system produces a substance known as an antibody.
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