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    Question ID:   10216         Current Version: 1
Question: What is an antibody?
Category: Science > Biology
Keywords: antigen, antibody
Type: what
Rating:(0 ratings)    Views: 594    Discussions: 0   In Watch Lists: 1  

 
    Answer:

Antibody is a blood protein that is produced in response to and counteracts an antigen. Examples of antigens include microorganisms (such as as bacteria, fungi, parasites, and viruses) and chemicals. Antibody is made by plasma cells (a type of white blood cell). Each antibody is unique can bind to and defends the body against only one specific antigen. The purpose of this binding is to help destroy the antigen. Antibodies can work in several ways, depending on the nature of the antigen. Some antibodies destroy antigens directly. Others make it easier for white blood cells to destroy the antigen.

The body's immune system produces antibodies when it detects harmful substances, called antigens. Antibodies are also be produced when the immune system mistakenly considers healthy tissue a harmful substance (autoimmuse disease). Antibodies help the body develop an immunity to disease.

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