The Major Inhibitory Neurotransmitter of the Human Brain Is

Question

The major inhibitory neurotransmitter of the human brain is
A)acetylcholine.
B)epinephrine.
C)glutamate.
D)nitric oxide.
E)GABA.

Accepted Answer

The major inhibitory neurotransmitter in the human brain is GABA (gamma-aminobutyric acid). It works by binding to GABA receptors on the postsynaptic neuron, causing hyperpolarization and making it less likely to generate an action potential. This makes GABA important for regulating brain activity and preventing over-excitation or seizures. The other options listed are either excitatory neurotransmitters (acetylcholine, epinephrine, glutamate) or gas neurotransmitters that have more modulatory roles (nitric oxide).