The secret of sleep
Sleep experts have different opinions on this issue, and there is no unified voice. There is a theory that sleep is to metabolize toxins produced when awake; It is also said that sleep is due to people's physiological habits and daily rhythm; Some people think that sleep can regulate people's mood and calm them down. ...
1
Theory of restoring physical strength
After a busy day, people will feel sleepy and can't help sleeping. Generally speaking, the purpose of sleeping is to rest, recharge and stay awake.
In fact, it is a physiological reaction of people wanting to sleep, and it is the result of the inhibition of nerve cells in the cerebral cortex after continuous excitement. When inhibition is dominant in the cerebral cortex, people will sleep. Inhibition is to protect nerve cells in order to make them excited again.
On the contrary, if a person lacks sleep for a long time, he will accumulate "sleep debt", which will affect his attention, muscle tension, logical thinking ability and even his daily life. "Overtime dogs" must have a deep understanding of this.
2
Energy theory
This theory was put forward by Allison Van Twell and Henry Van Twell in 1970. They think that sleep is to keep a high constant temperature.
People are warm-blooded animals, and when they are awake, they will have a high-energy metabolism, so they need to sleep to maintain their body temperature, save energy for the body and recharge their batteries. Isn't that what the saying goes, "It's great to get enough sleep"?
three
Static position theory
According to this theory, the purpose of human sleep is to avoid premature aging. No wonder girls clamor for beauty sleep every day.
Sleep is a good means of keeping in good health, which can help the human body eliminate toxins and enhance the ability of the human body to resist virus and bacterial infections. And help "repair" various loopholes in the human immune system.