It appears that those suffering from Parkinson's disease have relatively low levels of

A) serotonin.
B) glucose.
C) dopamine.
D) intelligence.

Parkinson's Disease

A progressive neurological disorder characterized by movement difficulties such as tremors, stiffness, slowness, and balance problems.

Serotonin

A neurotransmitter in the brain that plays a key role in mood regulation, digestion, sleep, and other bodily functions.

Dopamine

A neurotransmitter involved in many functions, including motivation, reward, attention, and regulation of movement.