When we sleep, our body produces hormones that help our cells to grow and repair themselves. Also, lack of sleep changes our metabolism, it will increase our appetite for food and particularly for glucose. Also when we lack sleep, our brains do not function properly, we won’t be able to remember things or process information. Scientists have studied before a teenage boy, who managed to stay awake for 11 days. During this period the boy had problems with his memory, speech and he also had hallucinations (when we see things that are not present).
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