問題詳情

       Men who receive transplanted kidneys from women are more likely to lose or reject them than they wouldorgans from other men. Physician Martin Zeier of the University of Heidelberg uncovered this pattern byscouring a giant database called the Collaborative Transplant Study, which collects records of organ donationfrom patients in 49 countries. After analyzing records of nearly 167,000 kidney, heart, and liver transplants, hefound that men had a 22 percent higher risk of rejecting or losing a donated kidney from a woman than onefrom a man within one year of transplant. Men were also 13 percent more likely to lose a woman’s heart. Noparallel effect was seen in women who received kidney or heart transplants from men.       This pattern hints at a fundamental, still-unknown difference between the immune systems of men andwomen. The presence or absence of estrogen, or a gender-related difference in the distribution of chemicalreceptors on the surface of cells, might influence immune reactions that can lead to organ acceptance orrejection. Nonetheless, Zeier would never advise a man to turn down a female kidney, especially since rejectioncan often be reversed with the proper drug regimen. And there are other factors—the age and health of thedonor, for example—that are much more important than the gender difference.
38 Which of the following is NOT true about the Collaborative Transplant Study?
(A) It collects specifically data about kidney transplants.
(B) Its data comes from more than a dozen countries.
(C) It was used by Dr. Zeier to study the success or failure of organ transplants.
(D) The data is collected from both male and female patients.

參考答案

答案：A
難度：困難0.380952
統計：A(8),B(6),C(4),D(3),E(0)

內容推薦

內容推薦