An allergy is an exaggerated immune response to a substance that is typically harmless to most people, known as an allergen. This hypersensitivity reaction involves the immune system overreacting, causing symptoms that can range from mild to severe.
5 Must Know Facts For Your Next Test
Allergies are classified as Type I hypersensitivities and are mediated by IgE antibodies.
Common allergens include pollen, pet dander, certain foods, and insect stings.
Mast cells and basophils play a crucial role in allergic reactions by releasing histamine and other inflammatory mediators.
Symptoms of allergies can include itching, swelling, hives, respiratory issues, and anaphylaxis in severe cases.
Epinephrine is commonly used as an emergency treatment for severe allergic reactions or anaphylaxis.