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Serotonin (/ ˌ s ɛr ə ˈ t oʊ n ɪ n, ˌ s ɪər ə-/) [6] [7] [8] or 5-hydroxytryptamine (5-HT) is a monoamine neurotransmitter.Its biological function is complex, touching on diverse functions including mood, cognition, reward, learning, memory, and numerous physiological processes such as vomiting and vasoconstriction.
Serotonin pathways are thought to modulate eating, both the amount as well as the motor processes associated with eating. The serotonergic projections into the hypothalamus are thought to be particularly relevant, and an increase in serotonergic signaling is thought to generally decrease food consumption (evidenced by fenfluramine , however ...
Dopamine Norepinephrine Serotonin. Monoamine neurotransmitters are neurotransmitters and neuromodulators that contain one amino group connected to an aromatic ring by a two-carbon chain (such as -CH 2-CH 2-). Examples are dopamine, norepinephrine and serotonin.
For example, the precursor of serotonin is the amino acid tryptophan. Peptide neurotransmitters, or neuropeptides , are protein transmitters which are larger than the classical small-molecule neurotransmitters and are often released together to elicit a modulatory effect. [ 4 ]
[citation needed] Indolamines are biologically synthesized from the essential amino acid tryptophan. Tryptophan is synthesized into serotonin through the addition of a hydroxyl group by the enzyme tryptophan hydroxylase and the subsequent removal of the carboxyl group by the enzyme 5-HTP decarboxylase .
The exact cause of Alzheimer’s disease has long evaded scientists, but experts typically suggest there are likely several factors (like genetics, environment, and lifestyle) that contribute to ...
5-HT receptors, 5-hydroxytryptamine receptors, or serotonin receptors, are a group of G protein-coupled receptor and ligand-gated ion channels found in the central and peripheral nervous systems. [ 1 ] [ 2 ] [ 3 ] They mediate both excitatory and inhibitory neurotransmission .
All of these words are associated with a noun that has different meanings (hint: one definition of the noun refers to a flat-bodied fish with a long, whip-like tail).