Question

Parkinson disease is a progressive loss of motor function due to the degeneration of specific neurons. These neurons secrete an inhibitory neurotransmitter that prevents excessive activity in motor centers of the brain. What neurotransmitter is this?

A-Glutamate
B-Acetylcholine
C-Serotonin
D-Dopamine
E-GABA

Answer 1

The inhibitory neurotransmitter associated with Parkinson's disease and produced by neurons in the substantia nigra is dopamine (D). Degeneration of these dopamine-producing neurons leads to motor and cognitive symptoms characteristic of the disease.

Step-by-step explanation:

Parkinson's disease is a neurodegenerative disorder characterized by the progressive loss of motor function due to the degeneration of specific neurons in the brain. These neurons are located in the substantia nigra and are essential for controlling muscle movement. The neurotransmitter secreted by these neurons is an inhibitory one, which prevents excessive activity in the brain's motor centers. The neurotransmitter in question is dopamine (D). As dopamine-producing neurons degenerate, symptoms such as tremors, slowed movement, rigidity, and postural instability become evident. In addition to motor symptoms, cognitive impairments like memory loss, depression, and dementia may develop as the disease progresses.