Fill in the Blanks 106-testOnline version 106-test by Farhad Key 1 antibodies acts an protect Future release allergic into mistakenly Allergies are abnormal immune system reactions to things that are typically harmless to most people . When you're to something , your immune system believes that this substance is harmful to your body . Substances that cause allergic reactions such as certain foods , dust , plant pollen , or medicines are known as allergens . In attempt to the body , the immune system produces the antibodies to that allergen . Those then cause certain cells in the body to chemicals into the bloodstream , one of which is histamine . The histamine then on the eyes , nose , throat , lungs , skin , or gastrointestinal tract and causes the symptoms of the allergic reaction . exposure to that same allergen will trigger this antibody response again . This means that every time you come contact with that allergen , you'll have some form of allergy symptoms .
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