Changes

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'''Serotonin''' is involved in emotions, conciousness, sleep and thermoregulation. '''Melatonin''' is responsible for the regulation of onset of sleep and also for seasonal changes in the body such as winter weight gain and mating seasons. '''Histamine''' release results in increased gastric secretions, dilation of capillaries, constriction of bronchial smooth muscle and decreased blood pressure.

'''Serotonin''' is involved in emotions, mood, sexuality, conciousness, sleep and thermoregulation. Serotonin it utilised by the central nervous system and the gastro-intestinal system. Serotonin has also been linked to mechanisms controlling pulmonary and cerebral vascular vasoconstriction.

'''Melatonin''' is responsible for the regulation of onset of sleep and also for seasonal changes in the body such as winter weight gain and mating seasons. '''Histamine''' release results in increased gastric secretions, dilation of capillaries, constriction of bronchial smooth muscle and decreased blood pressure.

====Other SMTs====

====Other SMTs====