Actor Michael J. Fox and boxing great Muhammad Ali have a disease that leads to progressive loss of their motor functioning. This condition results from a shortage of
A)epinephrine.
B)norepinephrine.
C)dopamine.
D)gamma-amniobutyric acid (GABA).
E)serotonin.

Question

Quizplus · Accepted Answer

The condition that leads to progressive loss of motor functioning in individuals like Michael J. Fox and Muhammad Ali is Parkinson's disease, which is primarily caused by a shortage of dopamine in the brain. Dopamine is a neurotransmitter that plays a key role in controlling movement and coordination.