Natural killer cells are capable of which of the following?
A) stimulating T cell memory
B) killing bacteria in the interstitial fluid
C) destroying body cells lacking MHC
D) shutting down adaptive immune responses
E) destroying parasites in the blood stream

Question

Quizplus · Accepted Answer

Natural killer cells (NK cells) are a type of lymphocyte that can recognize cells in the body that are devoid of class I major histocompatibility complex (MHC). Since class I MHC molecules are expressed on virtually all healthy cells, NK cells can target cells that have lost this molecule due to viral infection or cancerous transformation. Once a target cell is identified, NK cells can secrete cytotoxic molecules, such as perforin and granzymes, that lead to cell death. NK cells are not specialized to kill bacteria or parasites, nor do they facilitate T cell memory or shut down adaptive immune responses.

Natural Killer Cells Are Capable of Which of the Following