Look up: serotonin

1. 
   Serotonin
   Serotonin is a compound widely distributed in human tissue, particularly in the blood, wall of the intestine and the central nervous system. It acts as a neurotransmitter concerned especially with the process of sleep.
   Found on http://www.encyclo.co.uk/nol.php
   
   
2. 
   Serotonin
   A monoamine neurotransmitter believed to play many roles including, but not limited to, temperature regulation, sensory perception and the onset of sleep. Neurons using serotonin as a transmitter are found in the brain and in the gut. A number of antidepressant drugs are targeted to brain serotonin systems.
   Found on http://www.bbc.co.uk/radio4/reith2003/gl
   
   
3. 
   Serotonin
   ( 5 Hydroxytryptamine) is present throughout the body, especially in blood platelets and in the intestines. Its release from blood platelets contributes to the pain, vasoconstriction and inflammation after injury. In nervous tissue it functions as a neurotransmitter, mainly in the midbrain in clusters of cells called the raphe, and in the medulla. The fibres of these cells connect with the forebrain, cerebellum and spinal cord. It therefore exerts a strong influence over arousal, sensory perception, emotion and thought. Drugs which slow down the removal of serotonin can reduce depression and pain.
   Found on http://www.eclipse.co.uk/moordent/glossa
   
   
4. 
   Serotonin
   A hormone/neurotransmitter important to our mood state. See Depression!
   Found on http://www.gerardkeegan.co.uk/glossary/g
   
   
5. 
   serotonin
   [n] - a neurotransmitter involved in e.g. sleep and depression and memory
   Found on http://www.webdictionary.co.uk/definitio
   
   
6. 
   Serotonin
   One of the neurotransmitters used by the nerve cells in the brain. Together with dopamine, this neurotransmitter is believed to play a part in schizophrenia.
   Found on http://thewellnessshop.co.uk/healthandwe
   
   
7. 
   serotonin
   (Learning Modules / Psychology / Measuring the unmeasurable) A neurotransmitter of the monoamine group that generally has an excitatory effect.
   Found on http://www.makingthemodernworld.org.uk/l
   
   
8. 
   serotonin
   (Learning Modules / Psychology / Stress management) A neurotransmitter that has a role in the regulation of mood.
   Found on http://www.makingthemodernworld.org.uk/l
   
   
9. 
   Serotonin
   A hormone found in the brain, platelets, digestive system and the pineal gland (a small gland in the brain). It acts as a chemical messenger, sending messages between nerves (neurotransmitter). It also sends messages to make blood vessels narrower. Some carcinoid tumours make serotonin and high levels in the body can cause diarrhoea, wheezing and...
   Found on http://www.cancerhelp.org.uk/glossary.as
   
   
10. 
    Serotonin
    a chemical that transmits nerve impulses in the brain, causes blood vessels to constrict (narrow) at sites of bleeding, and stimulates smooth muscle movement in the intestines
    Found on http://www.medichecks.com/glossary.cfm?l
    
    
11. 
    Serotonin
    A major neurotransmitter involved in depression and anxiety. A quarter to a third of people with autism show abnormally high levels of serotonin in the blood.
    Found on http://www.nas.org.uk/nas/jsp/polopoly.j
    
    
12. 
    Serotonin
    Serotonin: A hormone, also called 5-hydroxytryptamine, in the pineal gland, blood platelets, the digestive tract, and the brain. Serotonin acts both as a chemical messenger that transmits nerve signals between nerve cells and that causes blood vessels to narrow. Changes in the serotonin levels in the brain can alter the mood. For example, medicatio ...
    Found on http://www.medterms.com/script/main/art.
    
    
13. 
    serotonin
    (= 5-hydroxytryptamine; 5-HT) A neurotransmitter and hormone(176 D), found in vertebrates, invertebrates and plants.
    Found on
    
    
14. 
    serotonin
    Synonym for 5-hydroxytryptamine ... <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 ...
    Found on http://www.mondofacto.com/facts/dictiona
    
    
15. 
    serotonin
    5-hydroxytryptamine noun a neurotransmitter involved in e.g. sleep and depression and memory
    Found on http://wordnet.princeton.edu/perl/webwn?
    
    
16. 
    Serotonin
    `Serotonin` (`5-hydroxytryptamine`, or `5-HT`) is a monoamine neurotransmitter synthesized in serotonergic neurons in the central nervous system (CNS) and enterochromaffin cells in the gastrointestinal tract of animals including humans. Serotonin is also found in many mushrooms and plants, including fruits and vegetables.
    Found on http://en.wikipedia.org/wiki/Serotonin
    
    
17. 
    serotonin
    (ser″o-to´nin) a hormone and neurotransmitter, 5-hydroxytryptamine (5-HT), found in many tissues, including blood platelets, intestinal mucosa, pineal body, and central nervous system; it has many physiologic properties, including inhibition of gastric secretion, stimulation of smooth muscles, and production...
    Found on http://www.mercksource.com/pp/us/cns/cns
    
    
18. 
    serotonin
    a chemical substance that is derived from the amino acid tryptophan. It occurs in the brain, intestinal tissue, blood platelets, and mast cells and ... [14 related articles]
    Found on http://www.britannica.com/eb/a-z/s/68
    
    
19. 
    serotonin
    serotonin A hormone, also called 5-hydroxytryptamine, in the pineal gland, blood platelets, the digestive tract, and the brain. Serotonin acts both as a chemical messenger that transmits nerve signals between nerve cells and that causes blood vessels to narrow. Changes in the serotonin levels in the brain can alter the mood. For example, medications that...
    Found on http://www.wordinfo.info/words/index/inf
    
    
20. 
    serotonin
    A vasoconstrictor, liberated by blood platelets, that inhibits gastric secretion and stimulates smooth muscle; present in relatively high concentrations in some areas of the central nervous system (hypothalamus, basal ganglia), and occurring in many peripheral tissues and cells and in carcinoid tumors. Syn: 5-hydroxytryptamine, thrombocytin, thromb...
    Found on
    
    
21. 
    Serotonin
    - ( 5 Hydroxytryptamine) is present throughout the body, especially in blood platelets and in the intestines. Its release from blood platelets contributes to the pain, vasoconstriction and inflammation after injury. In nervous tissue it functions as a neurotransmitter, mainly in the midbrain in clusters of cells called the raphe, and in the medulla...
    Found on http://www.eclipse.co.uk/moordent/glossa
    
    
22. 
    serotonin
    Also known as 5-hydroxytryptamine (5-HT), an aromatic amine derived from the amino acid tryptophan, and found in serum and other tissues, which affects the diameter of blood vessels and also functions as a neurotransmitter. Serotonin is released by mast cells, basophils, and platelets, and acts as...
    Found on http://www.daviddarling.info/encyclopedi
    
    
23. 
    serotonin
    serotonin (ser"utō'nin) , organic compound that was first recognized as a powerful vasoconstrictor occurring in blood serum. It was partially purified, crystallized, and named in 1948, and its structure was deduced a year later. Independent work indicated that serotonin was widely dist...
    Found on http://www.infoplease.com/ce6/sci/A08445