Dictionary » S » Serotonin


serotonin --> 5-hydroxytryptamine

(Science: biochemistry, hormone) A neurotransmitter and hormone (176 kD), found in vertebrates, invertebrates and plants. It is synthesised from the amino acid tryptophan by enterochromaffin cells in the gut and bronchi. It is metabolised to 5-HIAA in the liver and then excreted in the urine.

serotonin is measured on a venipuncture specimen in cases of suspected carcinoid syndrome (where it will be elevated). The normal range is 101 to 283 ng/ml.

Acronym: 5-HT

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Beet Root Pigment

... and donate methyl groups (CH3) for other processes in the body. These processes include the synthesis of neurotransmitters such as dopamine, serotonin. Methylation is also required for the biosynthesis of melatonin and the electron transport chain constituent coenzyme Q10.

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by jinx25
Mon Oct 08, 2012 2:54 am
Forum: General Discussion
Topic: Beet Root Pigment
Replies: 7
Views: 2791

Why do we feel sleepy after eating meal?

... of amino acids—one of the varieties being tryptophan—tryptophan is either a part of, a precursor of, or helps to make (I'm not sure, exactly) serotonin, which is a neurotransmitter involved in sleep. I would assume it is an inhibitory neurotransmitter. Okay, I looked it up. WebMD says: "L-tryptophan ...

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by animus
Tue Jun 19, 2012 3:39 am
Forum: Physiology
Topic: Why do we feel sleepy after eating meal?
Replies: 5
Views: 15790

Re: Electromagnetic fields generated by the human body

... being part of the mechanism (which would explain why you get headaches before rainstorms, around certain electronics, etc). Positive ions increase serotonin, stress also increases serotonin - which is what leads me to suspect the process is somehow reversable. I have a partial but incomplete theory ...

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by JoshuaFlynn
Thu May 24, 2012 11:50 pm
Forum: Human Biology
Topic: Electromagnetic fields generated by the human body
Replies: 36
Views: 136359

Nervous system

... cross over to the other brain hemisphere at the region of the pons. Some other sources, identify the cross over in the medulla. 3.Dopamine and serotonin are neurotransmitters produced by certain neurons in the brain. One effect of dopamine is that it brings about feelings of euphoria (pleasure). ...

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by Catherine89
Sun Feb 05, 2012 7:22 pm
Forum: Human Biology
Topic: Nervous system
Replies: 0
Views: 3137


... phenotypes are NOT due to variety of genetic changes. You have to remember that there is no “aggression gene”. So far, only mutations in the serotonin 5-HT1A and 5-HT1B receptor genes were implicated 1/ My reply If it was a hidden recessive ( as seemed to be the implication ) which was exposed ...

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by Crucible
Tue Oct 18, 2011 11:56 pm
Forum: Evolution
Topic: Evolution or De-evolution?
Replies: 52
Views: 30620
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