Why can human skin perceive night and day?

Squid, octopus, cuttlefish, portionalAmphibiansandChameleonand so on can change color in the blink of an eye because they have a brain-independent photoreceptor that belongs to a family of proteins called opsin.

Mammal. There are also opsins, and they are retina.

The most abundant protein, these photosensitizers are responsible for color vision (cone opsin) and low-light vision (rhodopsin). While previous studies have suggested that mammals may express opsins outside the eye, there is little information about which body functions they may affect.

However, the latest research has found a type of hair follicle in mice called nervesProteases(neuropsin) opsin, which can synchronize the circadian clock with the light and dark cycle, without relying on the eyes to see or the brain to perceive day and night.

Ethan Buhr, a co-author of the study and an assistant professor of ophthalmology research at the University of Washington School of Medicine, said it was previously thought that mammals evolved with the brain taking over information about all organs in the body, whether day or night. But the latest research has found that ** actually uses the previously mysterious opsin gene, neuroprotease, to express its own photoreceptors.

This means that even when in a petri dish, the change of day and night can be felt. Russ Van Gder, a professor of ophthalmology at the University of Washington School of Medicine, says that with neuroproteases, you can notice changes in time zones and adapt to the new ones within a few days.

The implications of this study for medicine are still being studied. But studies from other laboratories have shown that important physiological functions are controlled by circadian clocks. For example, due to the ability to repair DNA damage, there are also circadian rhythm changes, so the UV rays emitted in the afternoon are the same.

In comparison, early morning ultraviolet light on the cause of ** cancer in mice.

The effect is five times higher.

Researchers now want to see if they recover better if they are exposed to a specific type of light. Recent studies have also shown that administration at specific times of the day or night can have a significant impact on drug effectiveness, and it is likely that the same observations apply**.

External conditions such as temperature and humidity may change day and night.

It may be due to the fact that the outside temperature is not the same at night and during the day, so it can be perceived by **.

Because there is a significant difference in air temperature and humidity during the night and day, people's ** is sceptible, so they can perceive it.

Because the human ** has a lot of sensory tissues, it can perceive day and night.

This is a characteristic of human beings, who can perceive the dark sky and the day, so as to regulate the temperature.

This is because there is another one in the ** that is caused by neuroprotease.

The surface of the human being has a lot of receptors to habit, so it can be perceived.

Because the heat of the day and night is not the same, the feeling is different, so people's ** can be different.

Because it may be that the pores on the human ** will sense the light.

The body's body temperature is very stable, and it should be the same during the day and at night. But the outside of the human **. It's not the same at different temperatures. But there is not much of a gap.

Do you mean human body temperature? People are thermostatic.

There is a slight difference in body temperature between night and day.

No, man is an endothermic animal.

Because the information collected by the eyes is more than 95% of all information**, in the dark state, there is a large-scale lack of information collection, and it is afraid.

Because we can't see anything at night and the streets are empty, we tend to recall some bizarre things at this time. And during the day, there are a lot of people and it is very lively, so there is no fear during the day!

**Taiwan Science and Education Channel has a series of programs "What Are You Afraid of", one of which talks about why people are afraid of the dark.

This is actually an instinctive reaction of people, people's eyes are the main way to receive information, when people are in the dark, they can't observe the things around them through their eyes, and it is difficult to determine whether there is danger approaching them, at this time there will be a feeling of isolation, more or less fear. If the fear is high enough to a certain extent, it is also a psychological disorder.

Because you can't see anything at night, and you can't see your partner, you will feel lonely. At the same time, it is easy to be attacked by other things, so I feel insecure, which is a sense of self-protection. You need to go to bed early.

It's a psychological problem.

A sense of security is an instinctive human need, and the acquisition of a sense of security depends on the understanding of the situation. The darkness of the night deprives people of their understanding of the situation, and safety feels the shock, so they will be afraid.

Because it's dark at night, you can't see anything, and people often say that ghosts and things often appear at night, so you will be afraid.

I think yes, darkness represents the unknown, so be afraid.

Because I can't see anything in the night, I'm afraid.

for there is no seeing in the night;

insecurity;

The ghost is even more arrogant......

Man is a day-active creature The human eye is the main message of man** Just as lions are bolder at night than during the day (lions mainly hunt at night).

Humans have been afraid of wild beasts since ancient times, such as wolves, and most of them come out at night, probably because millions of years of human evolution have led to this unconditioned reflex.

People are afraid of what they don't know.

The one who likes the night and thinks it's safe to sleep in the wild can try it.

I like the night, and I feel safe.

The problem of light, copy the light that the sunlight shines on, after the reflection of the mirror, shines on your face, and the zhi light at your home at night shines on your face is a completely different light, so you will feel that your ** is better than the daytime at night, in fact, the one during the day is the more real you.

You can properly maintain, all year round are used with different skin care products, summer oil is more powerful, the weather is hot and sweaty, pores are large, you can use some refreshing oil control skin care products, spring and autumn is the most suitable weather in the year, people in the south can use refreshing oil control normally, the north is drier in spring and autumn to start using moisturizing skin care products, winter is the driest and coldest weather of the year, so whether it is the south or the north, Use moisturizing skincare products.

I don't recommend specific brands, to prevent people from saying that I am a micro-business, you can buy some normal skin care products for use according to the brands you have heard, mainly refreshing oil control and moisturizing and hydrating two kinds of it, and the other messy functions advertised are basically deceptive, don't believe what is recommended on the Internet, and it is more credible to find those brands that have counters.

After a night of repair, just sleeping** is very slippery, very white, looks very transparent, after a day of sun, looking at the computer, cosmetics or something, **will be dull, you must clean well at night, otherwise it is easy to acne, and cosmetics will remain.

Wash your face with hot water to enlarge the pores, then apply facial cleanser or soap to your face, rinse with cold water to shrink the pores. The face is not oily, and the pores are not large.

During the day, ** is constantly in a state of tension, coupled with air pollution and particle dust, **the surface is inevitably inside.

Dull and oily appearance may occur.

Therefore, whether you wear makeup or not, you should wear a barrier cream or sunscreen when you go out. At night, use a deep oil-controlling facial cleanser to clean** the dirt that has been absorbed. Just take some moisturizer for basic skin care, and maybe it will be better with a set.

The light problem during the day and at night, the day is cold light, so it looks bad during the day, and any shortcomings are exposed, and at night it is warm light, and warm light eats makeup, so it looks better, even if you remove makeup, it looks very good.

The reason is not **, it is the reason for the light, the maximum area of sunlight radiation during the day with three primary colors, the strongest light, and the best effect of artificial light at night is to simulate natural light.

If you don't believe it, try other items, it's also different day and night.

It's dusty during the day.,It's a world of difference compared to the night.。。 The reason why the day is not as good as the night is because of the different conditioning and secretion of hot water.

**It is the largest organ of the human body, and it has been operating for a day at night, and when you are tired, the small holes of ** are also breathing, diverging temperature.

There is also the problem of sunlight during the day and at night.

Morning and evening are different, but the light is different.

Tight, oily pores are signs of dehydration. Apply more**, drink**, and drink more!

Actually, it's the same, maybe it's the lighting.

The light is not the same during the day and at night. Visual reasons.

+1 also wants to ask why it looks a little better at night.

It's the lighting effect, and at the end of the day, there will be dust on the face, and it will feel dirty.

Could this be because it is natural light during the day, the light is relatively strong, and at night it is light, the light is not so strong, and the light intensity is different, so it looks different.

Because the air is relatively dry during the day, it can't lock in moisture, and at night there is less activity, and the air humidity is high, so after washing your face, you can lock in moisture.

I don't know, I'm like that too.

Because people are always afraid of things they don't understand, at night, you don't know what is going on around you, because you don't understand, so you will feel scared, and during the day, you can see everything around you clearly, and you know enough, so you don't feel afraid.

Once in an English class, the teacher asked us what we were most afraid of. Then my classmates said they were walking at night. Because if you walk on the road at night, you will always imagine that someone will follow you. In fact, no one may follow you, but you are very scared in your heart.

At night, people will be alert to everything around them because of the darkness, which is when the mind is highly focused, which will make you feel scared, and during the day, because you can see everything around you clearly, you will not be vigilant, so you will not feel afraid. And many horror movies are set at night, and under the influence of this, people will also be afraid of the night.

Because people can't see others clearly in the dark, and they can't see themselves clearly, maybe a pair of eyes are staring at you in the dark, which makes people feel creepy to think about. Some people feel very frightened in their own unknown space, just like some people have claustrophobia.

Because the day has light, and the night is different, it has a dark feeling, bringing you some bad impressions and visual touches, people come and go during the day, giving you a great sense of security, but the darkness is different, it will make you involuntarily afraid.

For the day is light, and the night is dark. Darkness always reminds people of some bad things, for example, if you watch ghost movies during the day, and at night you may unconsciously fantasize about the things in the ghost movies you watched during the day. If it's dark at night, there are bad guys.

Circadian phenomena on Earth – Day and night are a combination of day and night. The alternation of day and night is a natural phenomenon formed by the rotation of the earth under the irradiation of the sun. We live on the earth with one half of the sphere facing the sun and the other half of the sphere facing away from the sun, and those who stay in the half of the sphere facing the sun live in the daytime, and those who stay in the half of the sphere facing away from the sun live in the night.

Because the earth is constantly rotating, there is an alternation of day and night in every part of the earth.

Because the earth rotates as a opaque sphere, it will be daylight when facing the sun, otherwise it will be dark!

Nothing in the universe is static, and the same is true of the earth, which is spinning, and the so-called night and day are just projected on the front and back of it.

Because the earth rotates.

The discovery of the phenomenon of day-night depends on Copernicus's heliocentric theory: the earth revolves with the sun and rotates at the same time, which is a reasonable explanation for the phenomenon of day-night. 300 years after the heliocentric theory was proposed, a scientist named Foucault discovered the law of motion of the pendulum, which provided strong evidence for the heliocentric theory.

The earth rotates at the same time, and it takes 23 hours, 56 minutes and 4 seconds to rotate around in one revolution, and the revolution is about a degree, which is equivalent to 3 minutes and 56 seconds according to the speed of the earth's rotation, and the time, rotation plus the time taken to rotate is 24 hours. Longitude is every 15 degrees, and local time is one hour apart.

The significance of the Earth's rotation.

1. Change of date when crossing the date line: Because at any time, the East 12th District is always 24 hours earlier than the West 12th District, that is, one day. Therefore, from the 12th East District to the east to the 12th West District, the date is subtracted by one day; From the West 12th District to the west to the East 12th District, the date will be added by one day.

The East and West Districts have the same time, but the date is one day apart.

2. Objects that cause horizontal motion in any direction on the earth will deviate from the initial direction of their motion. If the moving object is oriented in the direction of travel, the horizontal object in the northern hemisphere is biased to the right, and the southern hemisphere is biased to the left.