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.
Whitetail Deer Antler Facts. Unlike horns on cattle which are permanent, male deer lose and re-grow their antlers every year. In the whitetail deer family only bucks over 1 year old have antlers. During winter bucks lose their antlers and then begin to re-grow new antlers. As the antlers grow they are covered in a soft hairy skin called velvet. The velvet supplies blood to the growing antlers and protects and feeds them.