Antibodies are included in second line of defense or in third line of defense(the complement proteins are antibodies) or not?
1 Answer
Jan 1, 2018
Antibodies are part of the third line of defense in the immune system.
Explanation:
The body's immune system has three lines of defense:
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Physical/Chemical. This is innate and non-specific and includes the skin, mucus, cilia, hair, gastric acid, urine, tears, saliva, etc.
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Nonspecific Resistance. This is also innate and comprises phagocytes which ingest foreign particles, inflammation and fever.
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Specific Resistance. This is acquired in response to antigens (reactive proteins) on the foreign particles which stimulate an antibody response through the involvement of T-cells and B-cells.
