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.
At 707 peak horsepower, the Challenger SRT Hellcat is the most powerful American production car â ever. Letâs review the Hellcatâs top 10 amazing facts to fully appreciate what the spoils of success have allowed Dodge to unleash on the American car-buying public. 2015 Dodge Challenger SRT Hellcat.