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.
British English: surmise NOUN. If you say that a particular conclusion is surmise, you mean that it is a guess based on the available evidence and you do not know for certain that it is true.It is mere surmise that the painter had his poem in mind when doing this painting.