1 Ghrelin is a fast-acting hormone that plays a vital role in meal initiation and contributes to weight gain.  Leptin mediates long-term regulation of energy balance and suppresses food intake, thereby inducing weight loss.
For the military, as for the civilian world, it is not overstating the point to say that the advent of radio communications has changed almost everything. The meerkat or suricate is a small mammal and a member of the mongoose family.
(sus-PEN-shunz) are unstable physical mixtures of undissolved particles in a liquid. Compared with solutions, suspensions contain larger and less miscible particles. The particles are generally visible to the naked eye but are not large enough to settle quickly to the bottom. Suspensions are not usually transparent and may be colored.