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 (and other ungulates, like elk) shed their antlers every year, then grow a completely new set. This shedding procedure takes two to three weeks to complete, while the regeneration takes an entire summer to complete â before the cycle starts all over again.