The suprachiasmic nuclei release growth hormone, which repair body tissues. report changes in light levels during the day and night to the optic nerve. are located in the brain stem. control falling asleep and awakening.

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consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.