Question

which of the following is the primary inhibitory neurotransmitter?
○ gamma-amino butyric acid (gaba)
○ acetylcholine
○ dopamine
○ glutamate

Explanation:

To determine the primary inhibitory neurotransmitter, we analyze each option:

• Gamma - amino butyric acid (GABA): Known to be the primary inhibitory neurotransmitter in the central nervous system, reducing neuronal excitability.
• Acetylcholine: Primarily involved in muscle movement and cognitive functions, it is an excitatory (in some cases modulatory) neurotransmitter.
• Dopamine: Involved in reward, motivation, and movement control, it is generally excitatory or modulatory.
• Glutamate: The primary excitatory neurotransmitter in the brain.

Answer:

A. Gamma - amino butyric acid (GABA)