Micro & Immunology · single question
Secretory IgA in saliva contributes to oral defense mainly by:
Show answer and explanation
Correct answer: B. Aggregating and neutralizing bacteria (antibacterial action)
- A. Buffering is performed by bicarbonate/phosphate.
- B. Correct. IgA's role is immune/antibacterial — agglutinating microbes and blocking adherence. (Consistent with the earlier IgA item.)
- C. Starch digestion is amylase.
- D. Remineralization is driven by calcium, phosphate and fluoride.
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