Research by Contemporary Neuroscientists Has Shown That

Multiple Choice

Research by contemporary neuroscientists has shown that:

A) no new central nervous system cells are produced after infancy.
B) extended immobility can regrow severed spinal-cord axons in animals.
C) it is impossible to regrow spinal-cord axons after damage.
D) severed spinal-cord axons in an animal regrow if treated with certain nervous system chemicals.