A neurotransmitter that is involved in the transmission of nerve impulses. Serotonin can trigger the release of substances in the blood vessels of the brain that in turn cause the pain of migraine. Serotonin is also key to mood regulation; pain perception; gastrointestinal function, including perception of hunger and satiety; and other physical fun [..]

A hormone found in the brain, platelets, digestive tract, and pineal gland. It acts both as a neurotransmitter (a substance that nerves use to send messages to one another) and a vasoconstrictor (a su [..]

neurotransmitting chemical, 1948, coined from sero-, comb. form of serum (q.v.) + ton(ic) + chemical suffix -in (2).

A neurotransmitter involved in mood, sleep, appetite, and impulsive and aggressive behavior. Too little has been associated with depression and some anxiety disorders (e.g., obsessive-compulsive disor [..]

A monoamine neurotransmitter that can act directly on neurons to modulate their activity via ionic or G-protein coupled receptors; chemical name 5-hydroxytryptamine, or 5-HT. © Nature Educatio [..]

A phenolic amine, found in the serum of clotted blood and in many other tissues, that possesses several poorly understood metabolic, vascular, and neural functions; 5-hydroxytryptamine. serous

A common monoamine neurotransmitter in the brain and central nervous system, gastrointestinal tract. It is synthesized from the dietary amino acid l.-tryptophan (see tryptophan hydroxylase), and in th [..]

Serotonin is a neurotransmitter with functions in various systems of the body. In the central nervous system serotonin works to regulate mood, appetite, sleep, memory and learning. When present, the n [..]

A synaptic transmitter that is produced in the raphe nuclei and is active in structures throughout the cerebral hemispheres. See Table 4.1; Figure 4.6.

Made in the central nervous system, but mostly found in the gut, this neurotransmitter is involved in controlling body temperature, mood, appetite and sleep. Drugs to increase serotonin levels are use [..]

An important neurochemical whose effects upon the human brain include mood elevation. Production of serotonin in the brain is increased by ingestion of the amino acid tryptophan (a chemical precursor [..]

(n) a neurotransmitter involved in e.g. sleep and depression and memory

A neurotransmitter that helps regulate sleep and appetite, mediate moods, and inhibit pain.

A neurotransmitter which causes blood vessels to constrict and contract and stimulates smooth muscle.

(n) a neurotransmitter

Vasoconstrictor that, in humans, is released by the blood platelets and found in high concentrations in many body tissues. It inhibits gastric secretion, stimulates smooth muscle serves as a central n [..]

neurotransmitter in the brain that modulates mood, appetite, sexual activity, aggression, body temperature and sleep

A hormone found in the brain, platelets, digestive tract, and pineal gland. It acts both as a neurotransmitter (a substance that nerves use to send messages to one another) and a vasoconstrictor (a su [..]

Serotonin is a chemical that is produced both in cells of the gastrointestinal tract as well as the nerves of the brain. In the brain, serotonin plays a role in the regulation of mood: people who are [..]

5-hydroxytryptamine. Serotonin is a neurotransmitter that may also function as a vasoconstrictor (substance that causes blood vessels to narrow).

A biochemical messenger and regulator, synthesized from the essential amino acid L-Tryptophan. In Humans it is found primarily in the Central Nervous System, Gastrointestinal Tract, and Blood Platelet [..]

A Serotonin receptor subtype found distributed through the Central Nervous System where they are involved in neuroendocrine Regulation of ACTH Secretion. The fact that this Serotonin receptor subtype [..]

A biochemical messenger and regulator, synthesized from the essential amino acid L-TRYPTOPHAN. In humans it is found primarily in the central nervous system, gastrointestinal tract, and blood platelet [..]

 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 [..]

a chemical necessary for communication between certain nerve cells.

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 [..]

A hormone found in the brain, platelets, digestive tract, and pineal gland. It acts both as a neurotransmitter (a substance that nerves use to send messages to one another) and a vasoconstrictor (a substance that causes blood vessels to narrow). A lack of serotonin in the brain is thought to be a cause of depression. Also called 5-hydroxytryptamine [..]

Serotonin is a neurochemical and hormone found in the brain, intestines, and blood platelets. It is believed to play a key role in emotional behaviour and moods, and is often attributed to happiness. Many people do not know that most of the body's serotonin is located in your gut.

Serotonin is a neurochemical and hormone found in the brain, intestines, and blood platelets. It is believed to play a key role in emotional behaviour and moods, and is often attributed to happiness. [..]

Serotonin (5-hydroxytryptamine: 5-HT) is a neurotransmitter produced in the human brainstem and synthesized from L-Tryptophan, an essential amino acid. Considered a hormone, it is found in the brain, [..]

an indolamine that is active as a neurotransmitter substance in the brain essential to brain functioning. On sexual pathways it acts as an inhibitor. See also dopamine; indolamine; catecholamine; biog [..]