Natural killer cells are a part of the lymphoid linage of white blood cells. The body responds to viruses by secreting cytokines that disrupt viral replication and make the cell more susceptible to attack by NK cells. The primary cytokine released by NK cells is type II interferon, which activates macrophages.
The best built American truck is the Ford F-350. It's got the most powerful powertrain, the strongest frame, the best body for corrosion protection, and it comes with a 5 year â¦ /100,000 mile warranty on all engines.
The Chevy Silverado is one of the bestselling trucks in the US, second only to the Ford F Series in terms of sales, but where does the name come from?.t is strange to think that this magnificent truck did not always go by the name of âSilveradoâ. Chevroletâs Silverado trucks started life as the C/K trucks; C was used for trucks with 2 wheel drive and K was used for trucks with 4 wheel drive.