Question

question 8 (1.7 points)
degeneration of the dopamine - releasing neurons of the ________ is the ultima
cause of parkinsons disease.
a) substantia nigra
b) reticular formation
c) red nucleus
d) internal capsule
question 9 (1.7 points)

Explanation:

Parkinson's disease is associated with the degeneration of dopamine - releasing neurons. The substantia nigra is a brain structure that contains a large number of dopamine - producing neurons. When these neurons in the substantia nigra degenerate, it leads to a decrease in dopamine levels in the brain, which is a key factor in the development of Parkinson's disease. The reticular formation is involved in functions like consciousness and arousal. The red nucleus is related to motor coordination (but not specifically dopamine - related in the context of Parkinson's). The internal capsule is a white matter structure for nerve fiber tracts and not directly related to dopamine - neuron degeneration in Parkinson's.

Answer:

A. substantia nigra