Stem cell transplants may someday be used to treat Parkinson's disease.Researchers are hopeful that the stem cells would alleviate the symptoms of Parkinson's disease by fulfilling which of the following?
A)preventing temporal lobe seizures
B)repairing sites of traumatic brain injury
C)replenishing missing ion channels
D)secreting the neurotransmitter dopamine
E)secreting the neurotransmitter acetylcholine