A hormone (from Greek á½ÏÎ¼Î®, impetus) is any member of a class of signaling molecules produced by glands in multicellular organisms that are transported by the circulatory system to target distant organs to regulate physiology and behaviour. Eicosanoids â hormones derive from lipids such as arachidonic acid, lipoxins and prostaglandins. 2  Steroid â Examples of steroid hormones include the sex hormones estradiol and testosterone as well as the stress hormone cortisol.
Rating Newest Oldest. Best Answer: Bull moose shed their antlers in late autumn or early winter, after the end of the breeding season. A new set begins to grow the following spring, nourished by the covering of furry skin known as velvet.
Deer, moose, caribou and elk grow antlers in the spring and summer and shed them in the winter. Many deer hunters and wildlife watchers eagerly search the woods in winter and early spring for sheds, the discarded antler racks from buck deer. People sometimes call these horns, but these are antlers, not horns. Antlers are temporary projections of bone grown and shed each year. Though the bone looks quite solid, it has a honeycombed structure at the microscopic level. Antlers arise from a pair of pedicels, knobby, skin-covered nubs atop the buck's skull. The pedicles are the âbuttonsâ between the ears of a buck fawn.