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.

Question

Quizplus · Accepted Answer

The statement that severed spinal-cord axons in an animal regrow if treated with certain nervous system chemicals is supported by contemporary neuroscience research. Both options A and C are false as new central nervous system cells can be produced in adulthood and while regrowing spinal-cord axons is challenging, it is not impossible. Option B is partially true, as regrowth of severed spinal-cord axons has been observed in animals after periods of immobility, but it is not a consistent or reliable method of regeneration.

Research by Contemporary Neuroscientists Has Shown That