Why does alcohol help fish survive the winter?

In the cold winter, the lake freezes. How can goldfish survive without oxygen？According to foreign reports, scientists have found that goldfish can survive on their own alcohol in an anaerobic environment, and the alcohol content in the blood can exceed the alcohol limit for driving after drinking.

Most vertebrates have been reported to die within minutes of hypoxia, but goldfish and their "relatives" wild crucian carp can live in anaerobic water for months。Biologically, fish can convert lactic acid produced under anaerobic conditions into alcohol, which can diffuse through the gills into the surrounding water. Dr Michael, an evolutionary physiologist at the University of Liverpool, said that during the winter months, the fish could have blood alcohol levels that exceeded the alcohol limit for alcohol driving.

The water surface of the pond is frozen, and the anaerobic environment in the pond will persist in the Nordic habitat for several months. ”。

Biologically, fish can convert lactic acid produced under anaerobic conditions into alcohol, which can diffuse through the gills into the surrounding water. Dr. Michael says the environment is still much better than being filled with lactic acid, which is the end product of the metabolism of other vertebrates, including humans, in the absence of oxygen. The blood alcohol content of crucian carp can reach more than 50mg 100ml.

According to Dr. Fáñez, lead author at the University of Oslo,:"The black crucian carp's ability to produce alcohol makes it the only fish that can survive and take advantage of the harsh environment".As a result, they generally avoid competing with fish that live in water with high oxygen content and avoid competing with other fish. "Predation".。This is probably why goldfish are one of the most adaptable pets in human care.

This is so because in alcohol will play a great role.

It may be that alcohol gives the fish the food they need to survive the winter.

This is because the fish's ** can produce heat in alcohol.

In winter, when the weather is cold, all kinds of plants can still survive the harsh winter and continue to grow, bloom and bear fruit in the coming year. What's the secret?

It turns out that before the arrival of the cold, plants physiologically make various adaptive responses accordingly: for example, the increase of soluble sugar content can increase the concentration of cell solution and reduce the water point. It can also buffer excessive dehydration of protoplasm and protect protoplasmic colloids from condensation.

In addition, sugar molecules have a huge surface activity capacity and can be adsorbed in organelles.

above the surface, weakening their ability to live. Intracellular sugar is abundant, osmotic pressure.

Enlarge, retain more water, and reduce icing outside. Others have reduced their water content to adapt to low temperatures and survive the cold winters.

When the temperature drops to about 5 in early winter, the aboveground growth of winter wheat basically stops, but photosynthesis occurs.

It continues slowly, when the synthesized product is not converted into starch or other insoluble substances, but in the form of soluble sugars (mainly glucose.

Accumulated in cells. Due to the chlorophyll of wheat seedlings in winter.

The formation is less, the cells are neutral or slightly acidic, at this time, the color of the wheat seedlings begins to turn red, which is a sign that the wheat seedlings have strong cold resistance and normal growth.

The flower buds of fruit trees can also safely overwinter, so that the next year's flowers will bloom and bear abundant fruits. This is mainly due to the change in the water content inside the flower buds. When the temperature drops, the flower buds quickly drain the water inside, allowing the sap inside the buds to reach a highly concentrated level.

This highly concentrated sap is extremely resistant to freezing, it does not freeze in severe cold, therefore, preventing cell membranes.

Cracking caused by freezing allows the cells in the flower buds to remain unharmed even when the temperature drops to minus 30.

A: The movement of animals is not conducive to evolution and mate competition, so it does not fit the topic B: The movement of animals is conducive to finding food, escaping predators, and reproducing races, so it does not fit the topic C:

Animals change their spatial position through movement not only for hibernation and wintering, so it is not in line with the topic

D: Animals change their spatial position relatively quickly through movement, so as to facilitate the search for food, escape from predators and reproduce races, so it is in line with the theme

Therefore, choose D

Blood pressure is more likely to rise when it's cold, so winter is the season for cardiovascular events.

For patients with high blood pressure, it is recommended to contact the attending physician in advance for follow-up in autumn and winter and adjust the ** plan according to their physical condition. Generally speaking, the dosage is larger in cold seasons such as autumn and winter than in summer. This prevents sudden increases in blood pressure from causing cardiovascular events.

Some antihypertensive drugs with a long half-life and only one day can be used to reduce the drug burden, such as Pingxin valsartan dispersible tablets, Ruishuxin levamlodipine besylate tablets, etc. Of course, take it under the guidance of a doctor.

In terms of lifestyle, patients with high blood pressure should pay attention to keeping warm, especially after falling asleep at night, when going out early in the morning and at night, before and after exercise, etc. When exercising, it is recommended to choose a slightly warmer temperature around 4 p.m. or around 10 a.m.

After the temperature is lowered, it is indeed easy to produce high blood pressure, and patients with high blood pressure must eat a light diet in winter, pay attention to controlling blood pressure, rest well, and eat more vegetables, especially vegetables like celery that can lower blood pressure.

In the cold winter, it is a test for patients with high blood pressure, and the heart needs to strengthen warmth, strengthen exercise, take blood pressure medication at the extreme, keep warm and sleep sufficiently, and do not overwork.

Yes, when it is cold, blood circulation will slow down and blood pressure will rise, so it is recommended that patients with high blood pressure pay attention to keeping warm in winter, do not do strenuous exercise, and the key is to take blood pressure medication on time.

When the weather is cold, the blood is viscous, and the blood pressure will rise, so you still have to pay attention to the blood pressure problem, otherwise you will regret it if something goes wrong, be careful to sail the boat for ten thousand years, drink more water, exercise more, pay attention to getting up slowly at night, three a minute, wake up and lie down for a minute, then sit up for a minute, stand up and wait for a minute, and then go to the toilet.

When it's cold, the blood vessels become thinner, so blood pressure will be higher, so in winter, you can keep warm properly and don't spend a long time outdoors.

Pay attention to keeping warm, take high blood pressure medicine on time, do aerobic and easy exercise appropriately, pay attention to eating habits, and have a reasonable work and rest time, so that high blood pressure will not attack.

Blood pressure is more likely to rise after the cold weather, hypertensive patients should keep warm in time, increase clothes according to temperature changes, especially in the morning and evening when the temperature is low, and wear a hat to prevent blood pressure changes caused by too much temperature difference, and at the same time keep a happy mood, healthy and happy, eat more fresh vegetables and fruits, and moderate exercise will definitely survive the cold winter.

Blood pressure is generally high when it's cold, so it's good to keep warm.