Most axons of vertebrates are enclosed in a myelin sheath, which increases the speed of impulse transmission; some large axons may transmit impulses at speeds up to 90 metres (300 feet) per second.
Lynda Carter Wonder Woman's STILL SUPER HOT. 61-year-old Lynda Carter -- famous for playing Wonder Woman on the '70s show -- must really have super powers ... because she's still scorchin' hot.
Lyn is herself in show business, and appeared in the Canadian television show Student Bodies. The soon to be former Mrs. Dule Hill also is a DJ, mixing under the name Ms. Nix. The marriage between Hill and Lyn was the first for both the 37-year-old Psych star and the 34-year-old actress, and the pair have no children.