The major protective function of secretory immunoglobulin A in the intestine is to:
Correct answer: A. Neutralize microbes at mucosal surfaces
- A. Neutralize microbes at mucosal surfaces
- B. Activate red blood cell production
- C. Cause systemic mast-cell degranulation
- D. Destroy infected cells through complement
Explanation
Secretory IgA binds microbes and toxins at mucosal surfaces, limiting their attachment and entry without causing extensive inflammation. Mast-cell degranulation is mainly associated with IgE, and systemic complement effects are not its principal mucosal role.
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About Veterinary Microbiology and Immunology
Covers the structure, classification, growth and transmission of bacteria, viruses, fungi and other disease causing microorganisms in animals. It explains innate and acquired immunity, antibodies, antigens, vaccination, hypersensitivity and diagnostic methods, while distinguishing infectious agents from the immune responses they produce.
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