Allergic response
Allergic Response
The Allergic Response (pronunciation: /əˈlɜːr.dʒɪk rɪˈspɒns/) is a reaction by the immune system to a substance that is not normally harmful.
Etymology
The term "allergic" is derived from the Greek words "allos" meaning "other" and "ergon" meaning "work". The term "response" comes from the Latin "respondere" meaning "to answer".
Definition
An allergic response is a hypersensitive reaction to a particular allergen; symptoms can vary greatly in intensity. This reaction is characterized by the body's immune system reacting to normally harmless substances in the environment. These substances are known as allergens and can include certain foods, pollen, or some medications.
Mechanism
The allergic response is a complex process that involves the immune system and several different types of cells. When an allergen enters the body, it triggers the production of antibodies. These antibodies bind to cells in the body, causing them to release chemicals such as histamine that lead to an allergic reaction.
Symptoms
Symptoms of an allergic response can range from mild to severe and can affect various parts of the body. Common symptoms include sneezing, itching, rash, and wheezing. In severe cases, an allergic response can lead to anaphylaxis, a potentially life-threatening condition that requires immediate medical attention.
Related Terms
- Allergen: A substance that causes an allergic reaction.
- Antibody: A protein produced by the body's immune system when it detects harmful substances.
- Histamine: A compound that is released by cells in response to injury and in allergic and inflammatory reactions.
- Anaphylaxis: A severe, potentially life-threatening allergic reaction.
External links
- Medical encyclopedia article on Allergic response
- Wikipedia's article - Allergic response
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