Lymphatic Immune System Quizlet Related

Review Lymphatic Immune System Quizlet related questions and content

What is the function of IgA?

  • A. Allergy mediation
  • B. Placental transfer
  • C. Mucosal immunity
  • D. Primary response
Correct Answer: C

Rationale: The correct answer is C: Mucosal immunity. IgA plays a crucial role in protecting mucosal surfaces, such as the lining of the gut and respiratory tract, from pathogens. It helps prevent infections by neutralizing and blocking the entry of harmful substances. IgA is not involved in allergy mediation (choice A), placental transfer (choice B), or primary response (choice D), as those functions are typically associated with other types of antibodies. IgA's specificity for mucosal surfaces makes it uniquely suited for providing defense at these vulnerable sites.