Without prior exposure to an antigen, which cells are able to destroy some types of tumor cells and some virus-infected cells?
A)Lymphocytes
B)Plasma cells
C)Megakaryocytes
D)Natural killer (NK) cells

Question

Quizplus · Accepted Answer

NK cells, which resemble large granular lymphocytes, kill some types of tumor cells (in vitro) and some virus-infected cells without being induced by previous exposure to these antigens. This capability is not true of lymphocytes, plasma cells, or megakaryocytes.

Without Prior Exposure to an Antigen, Which Cells Are Able