The respiratory system takes in air starting from your nose and mouth, then sends it through a tube in your throat called the trachea, and then into your lungs. The trachea connects to the lungs by splitting into two tubes called bronchiole tubes, which eventually split into smaller and smaller tubes.
Causes and contributors of low Serotonin Levels and Deficiency. Serotonin is synthesized in the brain and body from tryptophan an amino acid. Tryptophan converts into 5- hydroxytryptophan then into serotonin (5-hydroxytryptamine), if all of the co-factors are present.atural Serotonin is involved in the regulation of several processes within the brain, including, depression, mood, emotions, aggression, sleep, appetite, anxiety, memory and perceptions. Serotonin regulates these processes through pathways that innervate (connect to) different brain regions.
Serotonin and melatonin are both neurotransmitters derived from the essential amino acid tryptophan, found in protein. These brain messengers are important for regulating our sleep cycles and our moods.ryptophan is a precursor for 5-HTP, which is subsequently a precursor serotonin and melatonin. Therefore, tryptophan or 5-HTP may be consumed or supplemented to increase levels of both serotonin and melatonin in the body.