AASHDOOM
05-18-07, 10:20 AM
No one really knows why we sleep. There are two theories, but a theory is only an idea or a guess-scientists don't know if these theories are correct or not.
One theory of sleep is called the "repair theory" this theory says that during the day we use many important chemicals in our bodies and brains. We need sleep to make new chemicals and repair and fix our bodies. one piece of evidence for this theory is that our bodies produce more of a growth hormone ( a chemical that helps us grow) while we sleep.
Another theory is called the "adaptive theory." This theory says that sleep evolved because it stopped early humans and animals from wasting energy and putting themselves in danger from the other animals that killed and ate them, in other words ,sleep kept them safe and out of trouble. It was necessary for their survival.
Whatever the reason for sleep, everyone sleeps and everyone dreams every night. Many times we don’t remember our dreams, but we still dream. Like sleep.
No one knows exactly why we dream or what dreams means. There have been many theories about dreams throughout history. Many cultures believe that dreams can predict the future-that they can tell us what is going to happen to us. Sigmund freud and other psychologists and psychiatrists believe that dreams can tell us about our feeling and desires.
However ,some scientists now believe that dreams mean nothing at all dreams are caused by the electrical activity in our brains while we sleep. These scientists believe that nerve cells fire randomly and our brains try to make a story out of these meaning less patterns. These scientists say that dreams seem crazy and without meaning sometimes because they are crazy and without any meaning at all.
One theory of sleep is called the "repair theory" this theory says that during the day we use many important chemicals in our bodies and brains. We need sleep to make new chemicals and repair and fix our bodies. one piece of evidence for this theory is that our bodies produce more of a growth hormone ( a chemical that helps us grow) while we sleep.
Another theory is called the "adaptive theory." This theory says that sleep evolved because it stopped early humans and animals from wasting energy and putting themselves in danger from the other animals that killed and ate them, in other words ,sleep kept them safe and out of trouble. It was necessary for their survival.
Whatever the reason for sleep, everyone sleeps and everyone dreams every night. Many times we don’t remember our dreams, but we still dream. Like sleep.
No one knows exactly why we dream or what dreams means. There have been many theories about dreams throughout history. Many cultures believe that dreams can predict the future-that they can tell us what is going to happen to us. Sigmund freud and other psychologists and psychiatrists believe that dreams can tell us about our feeling and desires.
However ,some scientists now believe that dreams mean nothing at all dreams are caused by the electrical activity in our brains while we sleep. These scientists believe that nerve cells fire randomly and our brains try to make a story out of these meaning less patterns. These scientists say that dreams seem crazy and without meaning sometimes because they are crazy and without any meaning at all.