In an athlete who has suffered a second-degree quadriceps contusion, knee flexion is usually limited to:

Components of the central nervous system include:

a. the autonomic nervous system. c. the feed-or-breed system. b. the brain and spinal cord. d. sensory nerves in the skin.

__________ remove heat when discharged onto the surface of combustible materials. The heat is absorbed from the surface of the burning material, thereby lowering its temperature below the autoignition point

a. Halocarbons b. Water molecules c. Dry chemicals d. Carbon dioxide molecules