試題詳解

48. Stem cell transplants may someday be used to treat Parkinson's disease. Researchers are hopeful that these cells would alleviate the symptoms of Parkinson's disease by ________.
(A) preventing temporal lobe seizures
(B) repairing sites of traumatic brain injury
(C) replenishing missing ion channels
(D) secreting the neurotransmitter dopamine
(E) changing in myelination of axons