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Home Q & A Board Biology-Related Homework Help Medicine Immunology
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QiTian QiTian
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6 years ago
PD-1 is a negative co-stimulatory signal expressed by tumor cells. What advantage would the expression of PD-1 have in a tumor cell avoiding the immune response?
 
  A. None. Tumor cells are recognized as self and therefore do not pose a health threat.
  B. Tumor cells can avoid being killed by activated TC cells.
  C. Tumor cells can avoid apoptosis triggered by TH cells.
  D. Tumor cells avoid phagocytosis by dendritic cells.
  E. Tumor cells are stimulated to reproduce much faster than tumor cells that do not express PD-1.
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amelicox35amelicox35
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6 years ago
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QiTian Author
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6 years ago
You make an excellent tutor!
megan.xo
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Yesterday
this is exactly what I needed
emilyas19
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2 hours ago
Good timing, thanks!
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