Natural Killer Cells (NK Cells)carry Activating and Inhibitory Receptors on Their

Essay

Natural killer cells (NK cells)carry activating and inhibitory receptors on their surface.
A.What property of NK cells do these receptors activate or inhibit,respectively? Explain your answer.
B.How are NK cells thought to use these receptors to recognize and eliminate virus-infected cells?
C.Why are the actions of NK cells categorized as innate immunity,and what do we know of their specificity for MHC class I molecules?
D.Why do the NK cells of the recipient of an organ transplant sometimes attack the transplanted tissue?