Micro & Immunology · single question
Secretory IgA in saliva contributes to oral host defense primarily by:
Show answer and explanation
Correct answer: B. Aggregating and neutralizing bacteria (antibacterial immune action)
- A. Buffering is a function of bicarbonate/phosphate, not immunoglobulin.
- B. Correct. Secretory IgA is the main salivary antibody; it agglutinates microbes and blocks their adherence, an antibacterial/immune role.
- C. Starch digestion is salivary amylase.
- D. Lubrication is provided by mucins, not IgA.
Practice Micro & Immunology questions Micro & Immunology study notes