Bob Dylan, the single most important artist in the history of popular music, will be 70 years old on Tuesday, May 24. He was born Robert Allen Zimmerman in the flinty, scruffy city of Duluth, Minnesota, which teeters on the hills that plummet down to the shores of Lake Superior â a lake so large it has tidal movement.
Serotonergic receptors are found throughout the central nervous system and are involved in the regulation of the sleep-wake cycle, behavior, appetite, temperature and muscle tone, and serotonin neurotransmission is involved with the regulation of gastrointestinal motility and vascular tone.
Photo Credit Design Pics/Design Pics/Getty Images. Serotonin and melatonin are both hormones that regulate various human functions such as sleep, appetite and mood. Serotonin, which is produced in the body, is known as a neurotransmitter; this means it is responsible for sending messages between nerve cells.n turn, it is then converted into both serotonin and melatonin. Additionally, serotonin can be converted into melatonin by the body. Both 5-HTP and tryptophan can be purchased in supplemental form.