Sunday , June 11 2023

Sometimes genes or environment can make us "superrorodi"


perfect vision underwater

Most of us see if everything blurred eyes open underwater. It is due to a physical problem: the density of water is similar to that of eye fluid and can refract light entering the eye properly. But there is one exception: members of the Moken people, who live in the Andaman Sea, Indian Ocean sector between Burma and Thailand. It is believed that this genetic mutation created by the Moken spend a lot of time underwater, collect food from the sea bottom fishing and spear at the bottom of the sea. Research published in 2003 in Current journal Biology showed that the genetic mutation moken loa causes her eyes change shape under water, allowing the jirrefratta light properly enters and enables them to watch b & # 39; clearly, even deeper than 20 meters.

Fewer hours & # 39; sleep

This ability can & # 39; is used without the need to be part of an ethnic group with & # 39; in particular. Many studies have shown that many people want to sleep between seven & # 39; & # 39 nine; hours. However, in 2014 the American Academy of Medicine Sleep researched group & # 39; twins and discovered that people with the gene DEC2 mutatati have the ability to have more intense REM sleep, which makes their rest more effectively; therefore, b & # 39; & # 39 six hours, or less sleep to feel fully rested and ready to face the day. In any case, experts clarify that this mutation affects less than 1% & # 39; those reporting little sleep. So do not get your hopes: if you sleep little and think that is good because it can & # 39; have the genetic mutation, it is more likely that you need more hours of & # 39; rest.

more Bones b & # 39; his health

As aging, the skeleton loses density and mass, because what usually makes the body (continuously absorb and replace the bone tissue) n & # 39; longer works: and tissues the new bone is not enough to create what was deleted. We all suffer the tear our bones due to osteoporosis … except a few: they have mutated into & # 39; called SOST gene, responsible for the control of the sclerostin protein, which regulates bone growth, and their continue to accumulate density and mass with the passage of time, and give the skeleton of a much younger person. The mutation was found in & # 39; some people & # 39; Afrikaner origin (populations & # 39; Dutch origin living in Africa & # 39; South). Now scientists are looking for ways to replicate this mutation to other people be able to reverse the aging & # 39; their skeletons.

Adapting to high

The Andean communities jsejħuha as "soroche" and those sofrewha will not forget easily: it is the discomfort felt in & # 39; altitude the lack of & # 39; oxygen, and generally include dizziness, low blood pressure, pain & # 39; head and respiratory disorders. That is why travelers are advised to move slowly, eat little, and have a lot of "coca tea". But even if they do, most of which are "on the spot". Meanwhile, the guides give you the Inca Trail or accompanying excursions at the foothills of the Himalayas, loaded with suitcases, do so as if nothing … Is that altitude sickness does not affect people living in the mountains. Studies conducted both among the inhabitants of the Andes and among the Himalayas Tibetan proved to be genetic advantages that allow them to adapt to their environment have a larger torso and increased lung capacity, allowing incorporate more oxygen to any inspiration. And while most people produce more red blood cells in their body receives little oxygen, produce less. These properties are maintained even when populations move to lower places, and as part of their genes.

Tolerance to cold

The normal temperature range of humans is between 36.5 ° and 37.5 °; so we are ready to deal with heat. But the Inuits, who live in the Arctic, or the Nenets, north of Russia, have a unique genetic variant, inherited human Denisova (defined in 2010 as a new species & # 39; humans). This gene facilitates the production of heat by oxidation of & # 39; type & # 39; fat, and allows them to live in & # 39; very cold environments.

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