Dental Admissions Test (DAT) Practice Test

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Prepare for the Dental Admissions Test with our comprehensive quiz! Enhance your knowledge with multiple choice questions designed to simulate the actual DAT experience, complete with hints and detailed explanations. Ace your dental school application!

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Where is the immunoglobulin IgA found in the body?

  1. Blood only

  2. Lymphatic system

  3. Intercellular spaces

  4. Bodily secretions like tears and saliva

The correct answer is: 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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