Natural killer cells (NK cells) are a type of lymphocyte and also a component of innate immune system. NK cells play various functions in immune system and they play a major role in the host-rejection in virally infected cells.
NK cells are activated in response to interferons and also by various other responses. NK cells work to by secreting IFNγ and TNFα. Natural killer cells play a very important role in early host defense against viruses.
Aerobic respiration saves a lot of energy compared to anaerobic respiration. Aerobic activities can generate up to 38 ATP per gram of glucose consumed. Anaerobic reactions only produce 2 ATP per gram of glucose.
