Historically UVR has been used to increase systemic vitamin

Identify which of the following statements accurately describes when a person pushes off with the toes as he walks

a. He lacks the normal bending motion in metatarsophalangeal joints. b. His arches are probably stiff because he has a flat-footed gait. c. His arches are probably supple and springy because he rolls through his toes. d. He needs to practice rolling from heel to toe on each step to improve his gait.

Large, powerful muscles have:

a. Large motor units b. Small motor units