Your muscles. Some muscles are “voluntary.” They
are the ones you control, the ones that let you exercise—or
relax. Some muscles are “involuntary.” They just do their
job with no effort on your part—like your heart muscles.
Answer:
Multiple Sclerosis
Explanation:
Multiple Sclerosis is a potentially disabling disease of the brain and spinal cord (central nervous system).
C) The technician may be asked by the patient to interpret the images.
Answer: 
Explanation: If a contestant steps beyond the edge (scratch line), his jump is disallowed; if he leaps from too far behind the line, he loses valuable distance. ... Beginning in 1948, the women's long jump has been an Olympic event.
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