Question

abnormal levels of ____________ may lead to schizophrenia and parkinsons disease. a. gaba (gamma - aminobutyric acid) b. glutamate c. serotonin d. dopamine please select the best answer from the choices provided

Explanation:

Abnormal dopamine levels are associated with schizophrenia (too much dopamine is thought to play a role in positive symptoms) and Parkinson's disease (loss of dopamine - producing neurons in the brain's substantia nigra leads to motor symptoms).

Answer:

D. dopamine