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.
Here we go: Large American Brands: Ford: The original American car company, making everything from muscle cars to SUVâs to truck, they will almost constantly bash with Chevrolet owners over which brand is the ultimate American car. Chevrolet: Largest brand of General Motors, they make a variety of cars just like Ford. Dodge: Generally a bit more separated from the other two American brands, and now a subsidiary of Fiat-Chrysler, Dodge makes both family cars and muscle cars with an obscene amount of horsepower.