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) neurons in the central nervous system cannot regenerate and grow back.
C) precursor cells can replace damaged cells in a human spinal cord,thus restoring use of limbs.
D) severed spinal-cord axons in an animal regrow if treated with certain nervous-system chemicals.