Innate Immunity and Nonspecific Defenses Quiz
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Questions and Answers

What type of cells do natural killer (NK) cells kill?

  • Only tumor cells
  • Only virus-infected cells
  • Both tumor cells and virus-infected cells (correct)
  • Only healthy cells

    • Which receptors do NK cells use to recognize abnormal cells?

  • Cell activating receptor and cell inhibiting receptor
  • Antigen binding receptor and antigen disabling receptor
  • Kill activating receptor and kill inhibiting receptor (correct)
  • Antigen activating receptor and antigen inhibiting receptor

    • What happens if the kill inhibiting receptor binds to a 'self' antigen on a normal, healthy cell?

  • It activates the killing action
  • It has no effect on the cell
  • It triggers apoptosis in the cell
  • It turns off the killing action (correct)

    • How do NK cells recognize abnormal cells using the kill activating receptor?

    <p>By binding to common surface molecules found on cells</p> Signup and view all the answers

    Which type of immunity do NK cells qualify as agents of?

    <p>Innate nonspecific immunity</p> Signup and view all the answers

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