Why Do We Need Sleep? Essays

1716 Words Feb 26th, 2013 7 Pages
Why Do We Need Sleep?
Typed By: Miracle Taylor

Regulating sleep is something our bodies do that is as natural as eating, drinking, and breathing. This implies that sleeping serves a similar role in our health and well being.
Even though it is difficult to answer the question “Why do we need sleep?” scientists have developed several theories that may explain why we spend a third of our lives sleeping.
Comprehending these theories can help expand our appreciation of the function of sleep in our lives.
Most of us recognize at some level that sleep makes us feel better. We feel more energetic, happier, more alert, and better able to function after a good night’s sleep. However the fact that sleep makes us feel better
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The theory suggests that animals that were able to stay still and quiet during these periods of vulnerability had an advantage over other animals that remained active. These animals did not have accidents during activities in the dark, for example, and were not killed by predators. Through natural selection, this behavioral strategy presumably evolved to become what we now recognize as sleep.
A simple counter-argument to this theory is that it is always safer to remain conscious in order to be able to react to an emergency (even if lying still in the dark at night). Thus, there does not seem to be any advantage of being unconscious and asleep if safety is paramount.
Now that we have a more thorough understanding of what is known about the physiology of sleep, we can explore why sleep is so important and what happens when we do not get enough. From my research, it has become apparent that while much is known about the brain activity that occurs during sleep, little has been discovered about why we need sleep for survival.
Another explanation for why we sleep is based on the long-held belief that sleep in some way serves to "restore" what is lost in the body while we are awake. Sleep provides an opportunity for the body to repair and rejuvenate itself. In recent years, these ideas have gained support from empirical evidence collected in human and

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