posted by Jake .
Among humans, increased interest in food intake normally occurs _____.
only after the production of glucose in the liver can no longer meet metabolic needs
when fewer calories are taken in than are expended, but only after the body depletes its reserves of fat in the liver
via chemical signals related to the amount of glucose stored in the liver and muscle cells
via chemical signals related to the amount of protein stores in the liver
via chemical signals released when the stomach is empty