Moderate

The function of IgD is______________?

Correct answer: A. Antigen recognition by B cells

  • A. Antigen recognition by B cells
  • B. Localization protection in external secretion
  • C. Compliment activation
  • D. Reagin activity

Explanation

IgD is present mainly on the surface of naïve B cells, where it acts with IgM as a B-cell antigen receptor. Secretory protection is chiefly provided by IgA, complement activation is mainly associated with IgM and IgG, and reaginic activity refers to IgE.

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