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. The daily sleep time must reach 1 1 hour for children,1hour for primary school students, 8 hours for junior high school students and 7 hours for senior high school students.
Sleep is also a part of the metabolic process of memory cells: aging cells input every memory information into new cells for storage. These include sports, language areas, balance keys and memories in daily life. They are all matter, so they exist in the form of matter.
If a person lacks sleep for a long time and memory cells can't live healthily, it is prone to some health problems, even diseases, such as aphasia, spasm, convulsion, or shock and fainting caused by forced sleep. Cancer may also develop over time.
From a purely scientific point of view, waking up naturally is the best way, otherwise your life will be shortened. Regular life is a good foundation, but the chronic fatigue of regular life is dangerous.
Yawning is the first sign of our lack of sleep. If you stay awake 18 hours, your reaction time will increase from 0.25 seconds to 0.5 seconds, and it will become longer, and most people will suddenly feel sleepy. Every 2 to 20 seconds, you will find that you need to reread what you have just read.
Your eyelids will get heavier and heavier. After 20 hours, you will start taking a nap. Research shows that the reaction time of normal people is the same. A person's blood alcohol content is 0.08, which is easy to break when driving sideways. There are many things you will forget, such as misspelling your name or forgetting to hold the hand brake.
Extended data:
The role of sleep:
1, eliminate fatigue and restore physical strength:
Sleep is the main way to eliminate physical fatigue. Sleep is a good opportunity for gastrointestinal tract and its related organs to synthesize and produce human energy substances for activities. In addition, due to the decrease of body temperature, heart rate, blood pressure, respiration and some endocrine, the basal metabolic rate is reduced, so that physical strength can be restored.
2, protect the brain, restore energy:
Lack of sleep is manifested as irritability, excitement or listlessness, inattention and memory loss. Long-term lack of sleep can lead to hallucinations. People who get enough sleep are energetic, quick-thinking and efficient. This is because the oxygen consumption of the brain is greatly reduced during sleep, which is beneficial to the energy storage of brain cells. So sleep is good for protecting the brain and improving brain power.
3. Enhance immunity and restore the body:
Under normal circumstances, the human body can produce antibodies against various invasive antigen substances and remove them through immune reaction to protect human health. Sleep can enhance the body's ability to produce antibodies, thus enhancing the body's resistance. At the same time, sleep can also accelerate the self-healing of various tissues and organs. In modern medicine, sleep is often used as a treatment to help patients through the most painful period, which is conducive to the rehabilitation of diseases.
4. Promote growth and development:
Sleep is closely related to children's growth and development. Babies' brains continue to develop for a long time after birth, which is inseparable from sleep, and children's growth is accelerated during sleep, because plasma growth hormone can be maintained at a high level for several hours during sleep. Therefore, it is necessary to ensure that children get enough sleep and ensure their growth and development.
5, delay aging and prolong life:
Many survey data show that healthy and long-lived elderly people have good and normal sleep. A person's life is like a burning flame. If it burns regularly, it will last. If it burns up and down, it will shorten the time and make people die young. Sleep time is like minimal flame burning, so it can delay aging and ensure longevity.
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