Page 1149 - Clinical Immunology_ Principles and Practice ( PDFDrive )

CHaPter 81 Concepts and Challenges in Organ Transplantation 1114.e1

MUL ti PL e -CHO i C e QU e S ti ONS

1. The transfer of an organ between genetically identical individu- C. About the same as the frequency directed against a nominal
als is termed: antigen
A. An autograft D. Zero given that T cells are self-restricted
B. An allograft E. Approaching 10% of T cells
C. A xenograft 3. What mechanism is responsible for the presence of memory
D. An isograft T cells reactive against a graft in a patient receiving his or
E. A haplograft
her first transplant?
2. The proportion of T cells that are capable of directly recogniz- A. Previous blood transfusion
ing allogeneic major histocompatibility complex–peptide B. Previous pregnancy
complexes is: C. Heterologous immunity
A. Low before transplantation D. Direct allorecognition
B. Only the memory T-cell subpopulation E. All of the above