Cell-Mediated Immunity · Pathology

Natural killer cells differ from cytotoxic T cells because NK cells:

  1. Require antigen presentation via MHC
  2. Produce humoral antibodies
  3. Do not require prior sensitization
  4. Lack cytotoxic function
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Correct answer: Do not require prior sensitization

NK cells can kill infected or tumor cells without prior sensitization. They recognize cells with reduced MHC class I expression.

Difficulty: Medium Question 19 of 20

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