The major neurotransmitters responsible for establishing appropriate levels of mood are serotonin and dopamine. Neurotransmitters are chemicals in the brain that transmit signals from one nerve cell to another.
Firstly, serotonin is a neurotransmitter that is known for contributing to feelings of well-being and happiness. It is synthesized in the brain and the intestines, with the majority of serotonin being in the gastrointestinal tract. Serotonin contributes to various functions, such as regulating mood and social behavior, appetite and digestion, sleep, memory, and sexual desire and function.
Secondly, dopamine is a type of neurotransmitter that is associated with pleasure and reward. Dopamine is produced in several areas of the brain, including the substantia nigra and the ventral tegmental area. It is a chemical that transmits signals in the brain and other vital areas. Without dopamine, we would not be able to function properly because it is related to movement, memory, pleasurable reward, behavior and cognition, attention, inhibition of prolactin production, sleep, mood, and learning.
Therefore, the correct answer to this question is:
1) Serotonin and dopamine.