When you step out of the bright sunshine into a dark movie theater, your vision gradually adjusts to the relative gloom. this process is known as adaptation.
a. retinal
b. sensory
c. intensity
d. vestibular

Which of these is a fact about performance enhancing drugs? a. steroids lack addictive properties. b. steroids use can cause dangerous side effects. c. it is safe to use steroids when working out. d. a person can get in legal trouble for using steroids.