In the hypothalamus, the basal core deep in the brain, you will find a hunger center and a satiety center. Extra activity in these centers makes us feel full or hungry. If food enters the stomach bag and sets it up, the production of hunger hormone ghrelin is inhibited. That gives a full feeling. When nutrients from food are passed through the liver through the blood, the glucose concentration in the blood is recorded. This is reported to the hypothalamus via autonomic nerve pathways, which contributes to the feeling of satiety. The concentration of amino acids and fats also influences the hypothalamus and gives a full feeling. The hormone leptin is found in fat cells and is released when the fat in the cells increases. An increased concentration of leptin in the blood also gives a feeling of satiety and helps regulate energy conversion. If people have a mutation in the leptin gene, they have difficulty regulating their food intake. After all, they never feel completely full - and eventually get too fat.
It has been possible for a while to send electricity wirelessly, but the distance over which that happens is limited. There are electric toothbrushes in which a copper coil in the charger converts electricity into a magnetic field. A coil in the toothbrush captures that field and converts it back into electricity.Read More
What do we know Cosmologists note two important things: the universe is expanding faster and faster, and its supply of energy is limited. That means that in the distant future the stars will go out one by one until there are only red dwarf stars left. These convert hydrogen so slowly that some can last for 100 billion years.Read More
Men's flu is one thing - all kinds of illnesses that are a lot more deadly to men are something else. Men with tuberculosis are 1.5 times more likely to die from this disease than women. And men run a 5 times greater risk of cancer if they are infected with HPV. Women are the first choice A research team from the University of London thinks it has discovered why.Read More
The engines of an H-IIB rocket roar loudly. It is September 22, 2018 and the rocket is coming off Japanese soil. Then he starts his five-day trip to the international space station ISS. There is a special cargo on board: satellites measuring 10 x 10 x 27 centimeters, connected by a 14-meter steel cable.Read More
Category Body, Next Article
Heart tissue from spinach leaves - you just have to come up with it. Researchers at the Worcester Polytechnic Institute in the US were able to cultivate functional heart cells in spinach from the local supermarket. During a test, they sprayed an agent into the leaves that washed out the plant cells. In this way they retained the skeleton, complete with the fine network of vessels that provide the cells with water and nutrients.
It is not much bigger than your thumb and can radically change the way we conduct research in the future. A small chip that can imitate human organs has recently been included in a promising research project by the US Food and Drug Authority. Thanks to this approval, we may be able to test new drugs in the near future without animal testing and with much greater accuracy.
During a 36-hour operation, 100 doctors and assistants must place the head of an invalid on a healthy body. Critics say nerves in the spinal cord will sustain permanent injury, paralyzing the patient. But the surgeon behind the idea doesn't want to know anything about criticism. The operation is planned for 2017, and the main donor is already ready.
The vast majority of diseases are caused by errors in a cell or in one of the parts of a cell. Actually, it is therefore disproportionate to operate with instruments that are millions of times larger than the affected cells. Scientists have long been searching for ways to administer medicines deep into the body.