In hot and cold weather, an athlete should maintain a body temperature ideal for competition to avoid the likelihood of injury.

Myasthenia gravis is

a. Inherited as a sex-linked trait b. A form of tertiary syphilis c. An autoimmune disorder d. A demyelinating disorder of the PNS

Chemical messengers released directly into the bloodstream, with the ability to affect cells for hours or days are called ________

A) sensory cells B) dendrites C) neurotransmitters D) hormones