giving it priority by guiding our attention away from other stimuli. A lack of serotonin will impair directed attention, or concentration. It is also a key chemical factor in hypotension, vasomotor contractions and responses, sexual behavior, and sleep.The noradrenaline neurotransmitter acts as an excitatory transmitter (excites and inhibits neurons), and shows an uneven regional distribution because it occurs mainly in the lower sections of the brain. One function of this transmitter is that it controls glucogenolysis, by sending signals to the liver telling it to convert sugar into glucose, putting it in the blood stream, and creating energy for the individual. The chemical also creates energy for the body by controlling the conversion of fatty acids from the blood into energy for the body. Noradrenaline, like all other neurotransmitters, can be clogged up by substances such as antagonist drugs, manmade chemicals, some natural toxins, and heavy metal molecules. Unlike serotonin agonists, noradrenaline agonists are not addictive, and are therefore safe to use to help clear up transmitter blockages. The neurons respond to this form of stimulation by reducing weariness, by delivering more biochemical energy to the body in the form of increased glucose in the blood, and increasing the level of oxygen in the cells.Dopamine is a neurotransmitter that controls arousal in many parts of the brain. It is dispersed throughout the brain via distinct pathways, particularly to the prefrontal cortex, which it activates. It is responsible for motor behaviors, as well as inhibiting the peptide prolactin, a chemical that is responsible for intense stress. Dopamine also important for the protection of the cognitive sets that produce logical thought, and the ability to perform purposeful tasks, and the ability to concentrate and screen out nonmeaningful stimulus.Having unusual dopamine levels is considered a key factor in disorders like Parkins...
