Gerald has developed Parkinson’s disease due to a deficiency in a neurotransmitter, while Al developed schizophrenia due to an excess of this same neurotransmitter. The excitatory neurotransmitter that appears responsible for both of these conditions is ____.
a. dopamine.
b. acetylcholine.
c. serotonin.
d. glutamate.
Correct answer is option D. dopamine. Explanation: Gerald has developed Parkinson’s disease due to a deficiency in a neurotransmitter, while Al developed schizophrenia due to an excess of this same neurotransmitter. The excitatory neurotransmitter that appears responsible for both of these conditions is dopamine.