Dopamine is secreted by the ___________ and is deficient in ______ disease.

Dopamine is secreted by the ___________ and is deficient in ______ disease. 


A. cerebral cortex; Alzheimer 

B. amygdala; Lou Gehrig's 

C. medulla; Huntington 

D. substantia nigra; Parkinson 

E. brainstem; heart


Answer: 

D. substantia nigra; Parkinson


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