Why do Humans sleep?

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Why do Humans sleep?
Topic Started: Jul 10 2011, 03:58 PM (183 Views)
aaransandron	Jul 10 2011, 03:58 PM Post #1
Moderate User Posts: 26 Group: Visitor Member #137 Joined: July 3, 2011	When we sleep we tend to dream. Most movies, novels, artworks and great inventions in the world have come from someone’s dream. When we sleep we slip into the subconscious thoughts that our brain decides to feed us. Some people can control these dreams while others just sit by and see what happens. No matter what happens, dreaming is amazing.



Mario56	Jun 2 2012, 06:34 AM Post #2
New User Posts: 2 Group: Visitor Member #146 Joined: June 2, 2012	humans require sleep because: Sleep may be a way of recharging the brain. The brain has a chance to shut down and repair neurons and to exercise important neuronal connections that might otherwise deteriorate due to lack of activity. Sleep gives the brain an opportunity to reorganize data to help find a solution to problem, process newly learned information and organize and archive memories. Sleep lowers a person’s metabolic rate and energy consumption. The cardiovascular system also gets a break during sleep. Researchers have found that people with normal or high blood pressure experience a 20 to 30% reduction in blood pressure and 10 to 20% reduction in heart rate. During sleep, the body has a chance to replace chemicals and repair muscles, other tissues and aging or dead cells. In children and young adults, growth hormones are released during deep sleep. When a person falls asleep and wakes up is largely determined by his or her circadian rhythm, a day-night cycle of about 24 hours. Circadian rhythms greatly influence the timing, amount and quality of sleep. Edited by Mario56, Jun 2 2012, 06:35 AM.


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