Is the physical condition of ordinary people related to the weather change? why

I. Human body's response to weather changes dqFp"Xe"%

Although people sometimes fly in space or fly at high altitude far from the surface, they spend more time in the troposphere near the surface and are affected by weather changes such as cold, heat, wind, sun, rain, dryness and humidity, and the human body will have corresponding physiological reactions to these effects. 0c！ & lt\B

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Can you find a simple method to verify the influence of weather and climate change on human physiological processes? Scientists have recently discovered the simplest method: chemical analysis and determination of urine discharged by people every day. The principle of this method is very simple, because with the change of weather and climate, the values of many physiological indexes in human urination will change within 12~24 hours. For example, when cold air invades and the temperature drops sharply, the urine volume of human body increases obviously, the contents of chloride and urea hexosamine (or hexosamine) in urine decrease, and the pH value increases; When the warm front crosses the border and the temperature rises, the opposite change will occur. HJlxpX$_

6k{gI。 SG & ltbr & gt Under the influence of the same weather change, different health conditions will also make people react differently. If you are a healthy young man, because you have a strong thermal regulation function in your body and are sensitive to weather changes, the value of physiological indicators in your urine will change within 12 hours; Young and middle-aged people who are weak, especially the elderly, have relatively weak heat regulation function and relatively slow response to changes in temperature and warmth, so it often takes 24 hours for this physiological change in urine to appear. nXjSf & ltbr & gt。 VohW = D3 & ltbr & gt People's sensitive reaction to weather mainly includes three parts: skin, eyes and respiratory tract. TS = U %)Ik & lt； Br>\ i & lt7Lk & ltbr & gt 1, skin VW-y:, 5′ t8.

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(2) Ultraviolet radiation vTL/% SJ8

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The skin color of the human body is directly related to the amount of sun exposure, and everyone may have such a sense of * * *. In other words, regular exposure to the sun often makes people's skin darker and their bodies stronger. q9； VSF)

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Proper sunbathing can make infants develop normally and grow healthily, which has a good effect on preventing rickets and rickets in infants. Why does sunbathing have such a great effect on human body? This is because proper ultraviolet irradiation can promote the blood circulation and metabolism of human body, increase the secretion of hormones in human body, promote the absorption of calcium, and make people's bones stronger and their bodies stronger. " _=t 1UE

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However, if the intensity of ultraviolet radiation is too strong or the irradiation time is too long, ultraviolet rays will penetrate the skin and damage the tissues in the body, resulting in burns, sunburns and skin cancers. (CAkzgTfc

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Ultraviolet radiation will have a protective effect on human body. When the human body is irradiated by ultraviolet rays from the sun, many melanin which can absorb ultraviolet rays will be produced in the subcutaneous tissue, so people who are engaged in field work and often exposed to the sun will have darker skin. p:5v vs:s？

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Human eyes are extremely sensitive to the influence of weather changes and the invasion of toxic and harmful substances in the atmosphere. If people's eyes are often affected by weather changes such as cold, heat, sandstorm and smog, trachoma, conjunctivitis and other eye diseases will often occur. Zlygx？ 1? seven

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We live on the earth, always in contact with the atmosphere and affected by weather changes. When the external weather changes have an impact on the eyes, how will the human eyes react? It turns out that there is a protection system inside the human eye. When the eyes are affected by the above-mentioned unfavorable factors, the lacrimal passage will open and secrete appropriate tears to the eyeball, which can not only moisten and shower the eyeball, but also contain a lot of lysozyme, which can play a role in sterilization and prevention of eye diseases. (UTA3Db

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Sunshine is one of the indispensable conditions in human life. If a person lives in a dark cave or a completely opaque basement for a long time, it will lead to poor eyesight and weak body. This is because long-term darkness will change glucose metabolism in human body, reduce urine volume, reduce blood sugar content, and gradually weaken pituitary and adrenal functions. On the contrary, if exposed to the sun for a long time, it will affect the secretion of pituitary hormones through the optic nerve and affect people's life rhythm. Dr " PS & gt。

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In addition, if ultraviolet rays in solar radiation directly irradiate human eyes for a long time, it will kill epidermal cells on the cornea, lead to corneal opacity and even make people blind, so never look directly at the sun with your eyes. Me. ! l6lm\

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People must keep breathing and get enough oxygen from fresh air to sustain life. When the weather changes dramatically, people's respiratory tract and respiratory function will be affected, resulting in a series of changes. Zq:c2/\c}

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When the cold air in the north invades and the temperature drops sharply, the capillaries in the respiratory tract will contract, reducing the heat loss of the body. However, capillary contraction will reduce the speed of local blood circulation and weaken the body's resistance, and bacteria will take advantage of it. In this case, it is easy to cause virus infection. You must have had such an experience: the nasal mucosa is congested and swollen after a cold, and even the whole nasal cavity is blocked in severe cases, resulting in difficulty breathing. 6H； \Jt

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When the air is dry, the secretion of mucus and antibody in respiratory tract will decrease, the elasticity of mucous membrane will decrease, the cilia will decrease, and the blood flow will slow down, so that the respiratory tract can not effectively exclude the dust and bacteria inhaled in the air, and the preheating effect of inhaled air will also be greatly reduced. Kp！ Aay

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If people live in an excessively dry environment, the inhaled air will rupture the capillaries on the surface of the nasal cavity and bleed. * o & lt|^,R

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Some volatile substances are inhaled into the nasal cavity with the air, which will directly act on the olfactory nerve after entering the body, thus affecting the gastrointestinal function and causing certain changes in cardiovascular relaxation and contraction, hormone secretion, human mood and behavior. s=Kz9WLy

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Many physiological phenomena of human body are accomplished by electrical changes, such as the beating of heart muscle and the contraction of smooth muscle. When the human respiratory tract inhales some ionized air, these ions will enter the human body, which will have a certain impact on the electrical changes of human cells, showing the human body's response to this inhaled ionized air. For example, negative ions can usually enhance the cilia in the trachea and the vitality of human life, making people feel refreshed; Positive ions, on the other hand, have the opposite effect, causing symptoms such as decreased mucus secretion, dry throat, drowsiness and headache. =6=l.qyYK

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The development of large-scale industry has brought many environmental problems to people. The wastewater and waste gas discharged from factories contain a lot of toxic and harmful substances, such as sulfur dioxide, carbon dioxide, nitrogen dioxide, ozone and smoke. The air pollution caused by these harmful substances has become a social problem that endangers human health in all countries of the world. gm 1RQ^n,@.

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Exhaust pollution will cause many adverse reactions to the human body and seriously affect children's daily life. J8[ Average]

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When the concentration of sulfur dioxide exceeds 6mg/L, it will make the nasal cavity and throat feel uncomfortable; Nitrogen dioxide can damage lung health; Excessive carbon dioxide will not only affect the transport of oxygen in the body, but also cause damage to hemoglobin in the blood. & gtxXq:4l & gt； }

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Ozone is a toxic gas, even if a small amount of ozone enters the human body, it will stimulate the respiratory mucosa and make people feel uncomfortable; Ozone will also increase the incidence of infectious diseases in the population. jV<。 5GWq

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Industrial smog and inorganic mineral dust often cause silicosis, and organic pollen can make people allergic to skin. 0QEcJ]Qb8

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In a word, air pollution threatens human health all the time, which not only makes people dizzy and uncomfortable with eyes and throat, but also induces and aggravates diseases such as chronic rhinitis, bronchitis, asthma, emphysema and lung cancer. 7}(YCZny5

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When you enter the plateau for the first time, you will definitely feel that your heart rate and respiratory rate have increased compared with the past, because the altitude increases and the air pressure decreases, which will have a greater impact on the respiratory system. ]puDqu5！