Which of the following does not describe a safety mechanism to ensure that only infected cells are attacked by NK cells?
A) The default state is one of active inhibition,which must be overcome by activating signals before killing occurs.
B) Intimate contact with target cells is required.
C) Activating receptors are induced only after encountering an infected cell.
D) No single receptor-ligand interaction induces cytotoxicity,but instead many combinations of receptor-ligand interactions influence the decision to kill or not to kill a target cell.
Correct Answer:
Verified
Q22: _ is not an opsonin.
A)Mannose-binding lectin
B)IFN-\alpha
C)C-reactive protein
D)surfactant
Q23: Unlike inflammatory cytokines,Toll-like receptors _.
A)are never secreted
B)participate
Q24: Which of the following does not describe
Q25: Toll-like receptors are located _.
A)only on the
Q26: Stimulation of NK cells by IL-12 _.
A)enhances
Q28: All of the following statements regarding Toll-like
Q29: _ is a cytokine produced by both
Q30: of the following characterize serum amyloid protein
Q31: Toll-like receptors differ from scavenger receptors in
Q32: Measurement of which of the following is
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