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.
Instead, the list is dominated by Hondas and Toyotas: Numbers 2 through 6 are, respectively, the Toyota Camry, Honda Odyssey, Toyota Sienna, Toyota Tundra, and Toyota Avalon. The only American brands on the list are the Ford F-150 (#1), Chevrolet Corvette Stingray (#7), and Dodge SRT Viper (#10). And while Dodge is a traditional American brand, some would argue that it, too, is not really an American company because itâs part of the newly merged Fiat Chrysler, headquartered in London.