Melatonine+and+Endorphine

Melatonin is released by the pineal gland. It affects our sleep cycle. When it is dark, more melatonin is produced which makes us feel sleepy. When it is light out, less melatonin is released which makes us wake up.

An excess or a defiency in melatonin will cause for a person to either have problems with their sleeping cycle. If too much melatonine is produced then a person may always feel tired, and if not enough melatonine is produced then they may have trouble sleeping. An example of a syndrome to this is non 24-hour sleep-wake syndrome which is a problem because you sleep wake cycle doesn't work with the surroundings.

Endorphin

Produced by the pituitary gland during exersize They help to give you this feeling of well being while exercising. This is released when completing strenous and long workouts in order to help people as they start to get tired and have trouble breathing. Depersonalization Disorder is related to endorphin production and it is the feeling of feeling disconnected from your body while doing exercise. You body and mind aren't on the same terms.