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.
Japan's Toyota has the most made-in-the USA car: Camry. The most popular car assembled in the U.S. with the required percentage of domestic content is the Toyota Camry for the second year in a row, says Cars.com. The top five all come from Toyota or Honda.