Suggest two reasons why we need energy when we sleep?
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Energy use is particularly high during REM (rapid eye movement) sleep. During this time, your brain is highly active and you burn the most glucose, your body's source of fuel. Your heart rate and blood pressure also rise during this time, which burns more calories.
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Explanation:
Even while we are sleeping, several of our body functions are still go on in order to keep us alive.
For example: the heart keeps breathing and the cardiovascular system continues to function. Endocrine glands still function, growth hormone is secreted more while the person is asleep. The nervous system and urinogenital system continues to work. Our respiratory activities goes on. The body maintains its BMR. All this activities require energy. Hence we need energy while sleeping...
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