This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Classification and metabolism of amino acids, Subject name: Biochemistry
GABA (Gamma amino butyric acid) is characteristic of 
Select and explain. 
A. Post-synaptic excitatory transmitter, B. Post-synaptic inhibitory transmitter, C. Activator of glia-cell function, D. Inhibitor of glia cell function
B: Post-synaptic inhibitory transmitter
Answer: B: Post-synaptic inhibitory transmitter 
Explanation: Functions of GABA:- One of the major inhibitory neurotransmitters in brain. Regulates the activity of neurons by discouraging the transmission signals It is believed that GABA opens chloride channels & (|||) the permeability of post-synaptic membranes. (|) GABA levels will cause excitation in brain leading to convulsions