Why do people want to sleep, please, everyone, thank you

Because people can make a tired person become a full of energy in sleep, what is it like after you stay up late, I think you know In fact, the most important thing to sleep is to repair, repair the injured part of the human body, the food we eat every day is to repair it at night, if you don't sleep, but have been using the body, you will inevitably get sick in the long run, and you still have to sleep

Why do people eat and dress? It would be better if you didn't have to eat and dress. The age of machines has arrived.

People are tired and must rest, not machines. There's got to be a limit all day long

People are not machines, even if they are machines, they will be tired, but they also need to rest

This question is a legacy of history, just like people want to eat.

In order to maintain a good mental state, it is still the instinct of human beings.

People will sleep, on the one hand, because the density of oxygen in the air at night is lower than during the day, and the brain has a slight lack of oxygen supply, so the consciousness will have different degrees of blurring, coupled with the fatigue of daytime activities, sleep helps to restore physical strength, and at the same time, sleep can also help growth, so sleep is essential.

Regardless of the length of sleep, sleep seems to be an essential human behavior. This seems to have been accepted by many researchers. However, scientists have not yet been able to answer the question of why people sleep.

The function of sleep has become a fascinating mystery in brain science. Many researchers have come up with their own insights from different perspectives. The most common belief is that sleep is to eliminate physical fatigue and make up for the exhaustion of a day's work.

The evidence for the idea of "recovery" is that during the first few hours of sleep, the pituitary gland at the base of the brain releases large amounts of growth hormone, which promotes the metabolism of proteins in the body, which promotes the growth and repair of tissues in the body. Dr. Peter Garrick of the London Clinical Nutrition and Metabolism Research Group is negative.

He believes that the biggest impact on protein metabolism in the body is diet. Tissue protein increases when you eat and decreases when you fast.

The main reason why protein metabolism changes at night is not sleep itself, but that people don't eat at night. According to Garrick, no matter what kind of physical or mental work a person is engaged in, regardless of the level of fatigue, even if he does not sleep for 8 or 11 days, his or her bodily function is not impaired. The researchers examined the urine of people who did not sleep for 3 to 5 days in a sleep experiment and found that the amount of nitrogen in the urine of these people varied by less than one percent.

Nitrogen is a natural indicator of egg white matter metabolism in the body, so it can be judged that the physiological function of these subjects has not decreased. In addition, those who voluntarily reduced their sleep by two and a half hours did not show any pathological symptoms after one year, nor did they become exhausted by the reduced sleep. The most convincing argument is Professor Hartman, director of the sleep lab at the Boston Mental Health Center in the United States.

According to him, sleep has two functions: the first is to eliminate physical fatigue, and the second is to eliminate mental fatigue. In his opinion, the elimination of physical fatigue is unquestionable, and the function of eliminating mental fatigue has been discovered in recent years in the study of sleepers.

Hartmann once compared short sleepers who slept only four hours a night to long sleepers who slept eight or nine hours a night, and found that there was no physiological difference between short sleepers and long sleepers. They are the same height, weight, and even intelligence. And their respective psychological states are very different:

Long sleepers are always worried, while short sleepers are extremely optimistic. According to Hartmann, the elimination of physical fatigue occurs mainly in the so-called slow-wave sleep at the beginning of sleep, that is, during the period from drowsiness, light sleep to deep sleep, and in the slow-wave sleep after deep sleep. Short sleepers and long sleepers experienced diffuse sleep in almost equal proportions.

The recovery from mental fatigue mainly occurs during REM sleep after deep sleep. Because long sleepers have more worries than short sleepers, they need to recover from mental fatigue for longer periods of time than short sleepers; Short sleepers are the opposite. Hartman argues:

That's why Pauline, who sleeps only two hours a day, doesn't have REM sleep in his sleep.

From a physiological point of view, the natural state of human eyelids is drooping, that is, when the human brain no longer controls the eyelid (eyelid) muscles, the human eyelids are drooping, that is, the human eyes are closed. When people sleep, the higher nerve centers of the brain are inhibited, so the muscles that control the eyelids must be inhibited and lose control of the eyelid muscles, so people sleep with their eyes closed.

From the perspective of adaptation of organisms to the environment: organisms and the environment in which they live are adaptable, during sleep, people's defense of the external environment is limited, and for animals, the role of the eyes is incomparable, and closing the eyes can play a protective role in it. Moreover, the human eye needs to be moistened, otherwise the cornea will become blurred and even blind, and closing the eyes can keep it moist enough.

Moreover, when a person is sleeping, the visual center is in a state of inhibition, so that even if the eyes are open and the object is imaged in the eye, the brain still cannot perceive it, which was the case before Zhang Fei was killed. From the point of view of biological evolution: terrestrial animals, from frogs to other reptiles, birds, and mammals, all have their eyes closed when they sleep!

Of course, humans have inherited it without hesitation!

It is mainly caused by qi and blood deficiency and lack of qi and blood, slowing down the metabolism of blood, constricting blood vessels due to low temperature, weakening of blood reflux ability, poor blood circulation, fatigue or excessive toxins in the body. You may suffer from a cold, or you may be weak, lack of exercise, and have poor sleep quality! The liver fire is too strong!

Excessive pressure, too depressed mood, too long time on the Internet, physical strength decreases, and when the temperature and humidity change greatly, people's physical strength will decrease, and the resistance will decrease, the most common is cold, cough, dry mouth, nasal congestion, sore throat fever, slight cold, fatigue, irritability, body aches, difficulty concentrating, headache and a series of respiratory infections, which are due to the inhibition of cardiopulmonary function, the body may have insufficient oxygen supply, excessive loss of fluid and endocrine disorders, Liver dysfunction may cause you to be too empty and bored.

Your question is very talented, and it can basically be equated to why people eat.