Biology - Neural Control and Coordination Question with Solution | TestHub

Parkinson's disease is a progressive neurodegenerative disorder that primarily affects movement.

It is caused by the progressive degeneration and loss of dopamine-producing (dopaminergic) neurons in the substantia nigra region of the brain.

Loss of cholinergic neurons and accumulation of amyloid protein are characteristic features of Alzheimer's disease.

Underactivity of $\beta$-cells in the pancreas leads to diabetes mellitus.

Answer: degeneration of dopamine producing neurons.