Final answer:
GABA (gamma-aminobutyric acid) is the most prominent inhibitory neurotransmitter in the CNS. It is synthesized by the enzyme glutamic acid decarboxylase (GAD) and functions to hyperpolarize the postsynaptic membrane.
Step-by-step explanation:
The most prominent inhibitory neurotransmitter in the CNS is GABA (gamma-aminobutyric acid). GABA is synthesized by the enzyme glutamic acid decarboxylase (GAD) and is widely distributed throughout the vertebrate brain. It functions to hyperpolarize the postsynaptic membrane, making the neuron less likely to fire an action potential.
Learn more about GABAergic Neurotransmission