Neurotransmitters are proteins produced by the nervous system. To be classified as a neurotransmitter, a chemical must bridge the synapse and induce an electric current in a dendrite. Neurotransmitters may either excite the dendrite or inhibit it, and the same neurotransmitter may be excitatory or inhibitory in different neural circuits. Neurotransmitters that increase activity in the neuron are said to be excitatory. In contrast, neurotransmitters that decrease activity in the neuron are said to be inhibitory. That is, inhibition causes the neuron to make fewer action potentials rather than more. Common neurotransmitters include dopamine, acetylcholine, serotonin, gamma-aminobutyric acid (GABA), and norepinephrine. GABA is the most commonly used neurotransmitter in the human brain. Acetylcholine is used by neurons that innervate and control our
Neurotransmitters are proteins produced by the nervous system. To be classified as a neurotransmitter, a chemical must bridge the synapse and induce an electric current in a dendrite. Neurotransmitters may either excite the dendrite or inhibit it, and the same neurotransmitter may be excitatory or inhibitory in different neural circuits. Neurotransmitters that increase activity in the neuron are said to be excitatory. In contrast, neurotransmitters that decrease activity in the neuron are said to be inhibitory. That is, inhibition causes the neuron to make fewer action potentials rather than more. Common neurotransmitters include dopamine, acetylcholine, serotonin, gamma-aminobutyric acid (GABA), and norepinephrine. GABA is the most commonly used neurotransmitter in the human brain. Acetylcholine is used by neurons that innervate and control our