Final answer:
Natural Killer (NK) cells are sensitive to IgG and IgM antibodies, which can mediate antibody-dependent cell-mediated cytotoxicity (ADCC) and complement activation leading to cell lysis.
Step-by-step explanation:
The subject of question is science.
Natural Killer (NK) cells are sensitive to IgG and IgM antibodies. IgG antibodies can mediate antibody-dependent cell-mediated cytotoxicity (ADCC) with NK cells, whereas IgM antibodies can bind to cellular antigens, leading to complement activation and cell lysis.