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.
Since serotonin is a precursor for melatonin, serotonin deficiencies can lead to sleep disorders and insomnia. Insomnia is a condition where sleep is disturbed through trouble getting to sleep, trouble staying sleep and waking up too early in the morning.ryptophan and 5-HTP can be converted into serotonin in the digestive tract but must transported to the brain where it is then synthesized into melatonin. The pineal gland in the brain switches on melatonin synthesis when it detects lower levels of light in the ambient environment.