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Night said, “There are only a few things for your body that you have a complete innate drive to get it if you fall into a shortage.” “Oxygen, food, water and sodium.”
However, animals like ours do not feel the desire of salt as a powerful, controller drive as we do with oxygen, food and water. Sensors signal salt levels in the brain; In addition to OVLT and SFOs, sensors in the heart detects the stretch of atria and ventricles. However, there is no similarity of salt in the salt when we need, as it is churning the stomach for food or a regional throat screams for water. Instead, the need for salt intake is mediation by the taste and the reward of the brain. The knight said, “The taste of salt is pestal.” It is less good flavored; High doses it tastes hateful like drinking sea water. ”
Imagine the urge to eat a large bag of potato chips. If the body needs salt, those chips will create an enthusiasm for pleasing dopamine in the brain. If the body does not need salt, that dopamine drip disappears. “It learned quite a reinforcement,” Yuki okaA neurobologist at the California Institute of Technology who studies how the body maintains homeostesses. “More dopamine means a repeat behavior” “”
Each one is thirsty separately
A river observant scientists collect data and then have a choice about whether they will work in search of them. Similarly, only because the brain measures blood sodium levels does not mean that it has to work on that information.
Take thirteen-lined ground squirrels of Elena Gracheva. GrachevaA neurophysiologist in the Yale School of Medicine, the local rats study these rats in the North American grassland to understand how the specific brain regions control the thirst. The thirteen -lined ground squirrel is an ideal model for it, as it hibernates for more than half a year without eating or drinking. “They are like monks,” said Grachva. “They don’t go out for eight months. They don’t have water in the underground old.” How are they not thirsty?
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It is not that the squirrel does not require water. They do Their bodies shout for it. However, according to Grachva research, their brain ignores body signals during hibernation.
In mammals, a drop of blood water level (which means simultaneous increase in salt density, all things are equal) triggers two couples. The hypothalamus pumps the hormone vasopressin, which tells the kidney to hold water instead of urine, and the SFO removes the thirsty drive to instruct the animal to drink. However, when the ground squirrel is hibernating, their Vasopressin levels jumpHowever, the animal still does not drink. “The circuit of vasopressin was normal, but thirsty neurons were reduced,” said Gracheva. “These two paths are uninterrupted.” The body is trying to hold its water but does not work to swallow too much.
The argument of the disrupted circuit is extremely powerful. “Even if you wake up in the middle of their hibernation, they don’t drink,” Gracheva said.
The underlying network that Grachva studies in the squirrel includes universal, humans in mammals. However, the same neurological argument does not lead to the same behavior. When people are thirsty, they drink a glass of water. Cats and rabbits mostly drink water from food they eat. Camels can burn their fat stores for water (which produces carbon dioxide and water) but they receive its gallons and save it in their stomach when needed. Sea Otters can drink sea water and urinate the urine Saline than the water they are swimming; They are the only marine mammals to actively do this.
Each animal is specialized in ecosystems, lifestyle and electoral stresses on how every animal operates water and salt. The question is “What does it mean to be thirsty?” No one has the answer. We each thirst in our own way.
Real story Re -printed with permission How many magazinesAn editorially independent publishing Simon’s Foundation Whose aim is to increase the public understanding of the science of mathematics and the development of the research of physical and life science and covering the trends.
