1, Mao Dun's Midnight Four: "To tell you the truth, I have ordered my men to reload tonight and not to sleep." It is getting late. It's time for bed.
2, sleep, generally refers to human sleep, is an indispensable physiological phenomenon of human beings. In a person's life, sleep accounts for nearly13 of the time, and the quality of sleep is closely related to human health, which shows how important sleep is to everyone. In a sense, the quality of sleep determines the quality of life.
But why should a person sleep? This problem has always been a problem that scientists want to solve thoroughly. Recently, according to the British magazine "New Scientist", scientists have put forward several theories about the causes of sleep, ranging from simple energy-saving theory to complex theory involving memory processing, all of which have comprehensively discussed human sleep.
3. The importance of sleep: Everyone should have a good sleep after a busy day. Sleeping is a physiological reaction, a part of brain nerve activity, and the result of inhibition of nerve cells in cerebral cortex after continuous excitement. When inhibition is dominant in the cerebral cortex, people will sleep.
In life, people have work and rest, and in neural activities, people have excitement and inhibition. Inhibition is to protect nerve cells, make them excited again and let people continue to work. Children must sleep 1 1 hour, pupils1hour, junior high school students 8 hours and senior high school students 7 hours.
4. Sleeping is also a process of memory cell metabolism. Aging cells input the arrangement of each memory information into new cells for storage.