Immunoglobulin a
Immunoglobulin A (IgA)
Immunoglobulin A (IgA) is a type of antibody that plays a crucial role in the immune system's function in the mucous membranes. The chemical structure of IgA consists of two heavy chains of the alpha type and two light chains of either kappa or lambda type.
Pronunciation
Immunoglobulin A is pronounced as /ˌɪmjʊnəˈɡlɒbjʊlɪn eɪ/
Etymology
The term "Immunoglobulin" is derived from the Latin words "immunis" meaning exempt and "globus" meaning ball, referring to the globular proteins that function as antibodies. The "A" denotes the specific type of immunoglobulin.
Function
Immunoglobulin A is primarily found in areas of the body such as the nose, breathing passages, digestive tract, ears, eyes, and vagina. It protects body surfaces that are exposed to foreign substances from outside the body. It does this by neutralizing pathogens and preventing them from adhering to cells.
Related Terms
- Antibody: A protein produced by the body's immune system when it detects harmful substances, called antigens.
- Immune System: The body's defense against infectious organisms and other invaders.
- Mucous Membrane: The moist tissue that lines certain parts of the inside of your body.
- Pathogens: A bacterium, virus, or other microorganism that can cause disease.
See Also
External links
- Medical encyclopedia article on Immunoglobulin a
- Wikipedia's article - Immunoglobulin a
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