Respuesta :
Answer: D. GABA (gamma-aminobutyric acid).
Explanation:
- Neurotransmitters are chemical messengers that cross the synaptic gaps between neurons and thus, relay the message from one neuron to another.
- Based on the response they produce, neurotransmitters can be inhibitory or excitatory in nature.
- An inhibitory neurotransmitter is the one decreases the action potential producing ability of the neuron whereas the excitatory neurotransmitter does the opposite.
- Example of an excitatory neurotransmitter is glutamate.
- GABA is the major inhibitory neurotransmitter which is found in the adult brain whereas glycine is another inhibitory neurotransmitter that acts at the spinal cord.
