Question

current attempt in progress
the substantia nigra is known to secrete ____; a significant loss of this neurotransmitter is implicated in ____ disease.
serotonin; alzheimers
acetylcholine; parkinsons
endorphins; alzheimers
dopamine; parkinsons

Explanation:

The substantia nigra is a brain structure that secretes dopamine. A significant loss of dopamine - producing neurons in the substantia nigra is associated with Parkinson's disease. Serotonin is not secreted by the substantia nigra and is not related to Parkinson's in this context. Acetylcholine is not the main neurotransmitter secreted by the substantia nigra in relation to this disease. Endorphins are not secreted by the substantia nigra and are not associated with Parkinson's or Alzheimer's in this way.

Answer:

D. dopamine; Parkinson's