Immunology of Pregnancy MCQ Quiz | Basic Sciences

Welcome to the Immunology of Pregnancy MCQ Quiz! This specialized module is designed for MBBS students to test and deepen their understanding of the intricate immunological paradox that allows a semi-allogeneic fetus to thrive within the maternal host. This quiz covers essential topics including maternal-fetal tolerance, the unique role of the placenta, HLA expression, the function of decidual immune cells like uNK cells, and the crucial shift in T-helper cell responses. You’ll also encounter questions on the immunopathology of conditions like preeclampsia and recurrent pregnancy loss. Challenge yourself with these 25 questions to master this complex interplay. After submitting, you can review your score and download a complete PDF of the questions and correct answers for future study.

1. A successful pregnancy is typically associated with a shift in the maternal immune response towards which T-helper (Th) cell profile?

2. Which non-classical HLA molecule is uniquely expressed by extravillous trophoblasts and plays a crucial role in inhibiting maternal immune attack?

3. The primary function of Indoleamine 2,3-dioxygenase (IDO) at the maternal-fetal interface is to:

4. Which immune cell population is most abundant in the decidua during the first trimester of pregnancy?

5. The primary immunoglobulin class that crosses the placenta to provide passive immunity to the fetus is:

6. Which receptor is responsible for the transport of maternal IgG across the placental syncytiotrophoblast?

7. Preeclampsia, a serious pregnancy complication, is immunologically characterized by:

8. Regulatory T cells (Tregs) are crucial for maternal tolerance. Their primary role is to:

9. The syncytiotrophoblast layer of the placenta avoids immune recognition primarily by:

10. Uterine NK (uNK) cells are phenotypically and functionally different from peripheral blood NK (pNK) cells. A key feature of uNK cells is that they are:

11. Which hormone, produced in large quantities during pregnancy, has significant immunomodulatory effects, including promoting a Th2 shift?

12. The Fas/FasL system at the maternal-fetal interface contributes to immune tolerance by:

13. Which cytokine is considered a key mediator of the pro-pregnancy Th2 response and is essential for maintaining immune tolerance?

14. Human Chorionic Gonadotropin (hCG) contributes to immune modulation during early pregnancy by:

15. The term “fetal allograft” refers to the concept that the fetus is:

16. Rh isoimmunization, leading to hemolytic disease of the fetus and newborn, occurs under which circumstance?

17. Extravillous trophoblasts (EVTs) that invade the maternal spiral arteries express which combination of HLA molecules to interact with maternal immune cells?

18. A failure to properly shift from a Th1 to a Th2 cytokine profile is strongly associated with which pregnancy complication?

19. Which complement regulatory protein is highly expressed on the surface of syncytiotrophoblasts to protect the placenta from complement-mediated damage?

20. The “paternal antigen paradox” is largely resolved by which of the following mechanisms?

21. The interaction between HLA-G on trophoblasts and which receptor on uNK cells is critical for tolerance?

22. The decidua, the specialized endometrium of pregnancy, is best described as:

23. Which of the following is NOT considered a primary mechanism of maternal-fetal tolerance?

24. Over-activation of which complement pathway is implicated in the pathology of adverse pregnancy outcomes like antiphospholipid syndrome and preeclampsia?

25. The interaction between paternal HLA-C on trophoblast cells and maternal KIR receptors on uNK cells is important for:

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