But go ahead and thumb through your dict ionary and see how many more words it in dic ates have this useful root! 1  dictionary: tells how to âsayâ words. 2  addict : âspeaksâ heavily towards something. 3  predict : âsayâ beforehand. 4  contradict : âsayâ against.
Neurotransmitters: Exciting and Inhibiting. Gamma-Amino-Butyric-Acid, or GABA, is the chief inhibitory neurotransmitter in the human brain. Along with serotonin, dopamine, glutamate, glycine, histamine, and norepinephrine, among dozens of other neurotransmitters, GABA regulates brain function.eurotransmitters: Exciting and Inhibiting. Gamma-Amino-Butyric-Acid, or GABA, is the chief inhibitory neurotransmitter in the human brain. Along with serotonin, dopamine, glutamate, glycine, histamine, and norepinephrine, among dozens of other neurotransmitters, GABA regulates brain function.
Less is known about the GABA B receptor, primarily due to the limited number of pharmacological agents selective for this site. Originally, GABA B receptors were identified by their insensitivity to the GABA A antagonist bicuculline and certain GABA A-specific agonists [ 1, 10 ].ABA B receptors are coupled indirectly to K + channels. When activated, these receptors can decrease Ca 2+ conductance and inhibit cAMP production via intracellular mechanisms mediated by G proteins. GABA B receptors can mediate both postsynaptic and presynaptic inhibition.