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Why Do We Sleep? Essay

762 words - 4 pages

“Why do we sleep?” is a very popular questions that many humans ask today. Sleep is very sufficient to the human body. If it was not important, then God would not have designed for a third of our life to be occupied by sleep. During this time period, many people are interested to know what is a good amount of sleep and what are the harmful effects to not getting enough sleep.

The question “why do we sleep?” is a very difficult question to answer. One way to think about why sleep is important is looking at sleep as if it was food. Food helps us feel better and also helps the human body function properly.There are many different assumptions on why we sleep.The first is that sleeping allows the body to repair cells damaged by metabolic byproducts called free radicals. The production of these highly reactive substances increases during the day, when metabolism is faster. Although,scientists have found that the expression of genes involved in fixing cells gets kicked up a notch during sleep. This assumption is consistent with the fact that smaller animals, which tend to have a higher metabolism and therefore produce more free radicals, tend to sleep more. For example, some mice sleep for 20 hours a day, while giraffes and elephants only need two or three hours of power naps. Sleep might also be a time for your brain to do a little housekeeping. As you learn and absorb information throughout the day, you’re constantly generating new ideas, the junctions between neurons through which brain signals travel. Your skull has limited space, so bedtime might be when unnecessary thoughts are cleaned out.

Throughout research, you can specify exactly how much sleep you need.The amount of sleep you need is different for different ages.Newborns need anywhere from 12-18 hours of sleep, infants need 14-15, toddlers need 12-14, preschoolers need 11-13, school age children need 10-11, teens need 8.5-9.5, and adults need at least 7-9 hours of sleep to be fully recovered.
There is really no “magical number” for how much sleep you need. It varies and is different for different individuals. Some people can be fully energized off...

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