What is serotonin and noradrenaline?

Answer 1

Serotonin is a neurotransmitter that is mainly found in the Gastrointestinal Tract and the Central Nervous System. Serotonin is mostly used to regulate intestinal movement within the intestines but the rest with in the body is used to regulate various functions through the Central Nervous System. Examples of Serotonin regulated functions are mood, appetite, sleep, muscle contractions, and some cognitive functions like memory or learning. Noradrenaline, or Norepinephrine, is another neurotransmitter that has a dual role as a hormone. Norepinephrine is involved in the human body's Fight-or-Flight response. Norepinephrine as well as Epinephrine, increases heart rate, triggers the release of glucose from storage in the body, and increases blood flow to muscles.