Dental Admissions Test (DAT) Practice Test 2025 - Free DAT Practice Questions and Study Guide

Question: 1 / 400

Where is the immunoglobulin IgA found in the body?

Blood only

Lymphatic system

Intercellular spaces

Bodily secretions like tears and saliva

IgA is primarily found in bodily secretions like tears, saliva, and mucous secretions in the respiratory, gastrointestinal, and genitourinary tracts. This specific immunoglobulin plays a crucial role in mucosal immunity by protecting these surfaces from pathogens. While IgA can be present in blood and the lymphatic system to a lesser extent, its main function lies in bodily secretions, making option D the correct answer.

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