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Tag: "muscles" at biology news

Nano springs eternal; Protozoan 'engine' posts nano records

...e power of the spasmoneme engine outperforms human muscles and car engines. It also runs on a different fuel. Molecular motors that power muscle contraction, for example, use ATP molecules for energy. The spasmoneme runs on calcium, but its drive mechanism was poorly understood until France and colleagues...

Are U.S. Flu Death Figures More PR Than Science?

...e power of the spasmoneme engine outperforms human muscles and car engines. It also runs on a different fuel. Molecular motors that power muscle contraction, for example, use ATP molecules for energy. The spasmoneme runs on calcium, but its drive mechanism was poorly understood until France and colleagues...

Similar Stem Cells In Insect And Human Gut

...e power of the spasmoneme engine outperforms human muscles and car engines. It also runs on a different fuel. Molecular motors that power muscle contraction, for example, use ATP molecules for energy. The spasmoneme runs on calcium, but its drive mechanism was poorly understood until France and colleagues...

Scientists crack code for motor neuron wiring

...rons in the spinal cord connect to specific target muscles in the limbs. The researchers said that understan...s that determines whether motor neurons project to muscles in the dorsal or ventral halves of the limb; and finally, the motor neuron pool identity that govern...

Mouse study: New muscle-building agent beats all previous ones

...ocking out the gene that codes for myostatin, grew muscles twice as big as normal mice. An antibody against m...atin now in clinical trials caused mice to develop muscles 25 percent larger than those of untreated mice after five weeks or more of treatment. The research...

Genetic key to growth of new arteries is identified

...h areas of the MMP2 gene are activated in skeletal muscles where blood flow is decreased. The researchers m... MMP2 gene coupled to the so-called blue gene. Leg muscles turned blue only in the strain of mice with the specific gene fragment that turns on in response to ...

Stem cells from muscles can repair cartilage

...r cartilage. Previous studies have suggested that muscles contain stem cells that can develop in various ways, including into cells that lead to the formation of bone. In a study published in the February 2006 issue of Arthritis & Rheumatism ( http://www.interscience.wiley.com/journal/arthritis ), rese...

Growth hormone is made in the brain, report scientists

..."Growth hormone has been associated with growth of muscles and bones, and the production of it was believed to lie mainly in the pituitary gland," said co-author Ken S. Kosik, co-director of the Neuroscience Research Center at the University of California, Santa Barbara. "No one had thought too much about wh...

How does the brain know what the right hand is doing?

...ys that the brain monitors signals it sends to the muscles telling them how strongly to contract, and uses this to predict where the limb has moved to; (2) the inflow hypothesis suggests that the brain relies on information from sensors within tissues that say how far a limb has moved. While there has been ...

University of Utah to help build bionic arm

... take the signals that go to all the different arm muscles at once, and all the person has to do is think about natural movement and the arm will respond in a natural way. We're basically listening in on what the nervous system would be telling the natural arm, and translating that into signals that will mov...

Both alcoholism and chronic smoking can damage the brain's prefrontal cortex

... take the signals that go to all the different arm muscles at once, and all the person has to do is think about natural movement and the arm will respond in a natural way. We're basically listening in on what the nervous system would be telling the natural arm, and translating that into signals that will mov...

Lactic acid not athlete's poison, but an energy source - if you know how to use it

...d is poison, a waste product that builds up in the muscles and leads to muscle fatigue, reduced performance a...f you use it up, it doesn't accumulate." To move, muscles need energy in the form of ATP, adenosine triphosphate. Most people think glucose, a sugar, supplies...

Honeybee decision-making ability rivals any department committee

...n the swarm that it's time to warm up their flight muscles in preparation for takeoff. Each scout does so by scrambling through the swarm cluster and briefly pressing its vibrating thorax against the other bees to stimulate them to activate their wing muscles. Once every bee has its thorax warmed to 95 degre...

Scientists develop a way to make the deadliest toxin known even more toxic

...ng the release of acetylcholine, which signals the muscles to contract, including those that regulate breathing. Blocking the nerve signal results in paralysis and, unless treated quickly, death. A lethal dose is small--eight tenths of an inhaled microgram for a 175-pound person. Because of its highly pote...

Movement of chromosome in nucleus visualized

...hysical work. Because these molecules can contract muscles or move things around, they are called molecular motors. de Lanerolle and his colleagues were able to offer the Belmont laboratory a number of ways to test whether the chromosome movement was actin/myosin-dependent. When the researchers introduced ...

A new way of looking at molecular motors

...a person moves hand over hand along a rope. Making muscles contract involves a large number of motors that work very fast in neatly arranged teams, quickly letting go of the track once they have completed their "power stroke." Most molecular motors have a head, a neck (which powers movement), and a tail. M...

MIT research holds promise for Huntington's treatment

...transmits signals to the corpus striatum, allowing muscles to make smooth, controlled movements. When those dopamine-producing cells die, Parkinson's patients exhibit the tremors that are characteristic of the disease. The researchers are now working on finding a more potent version of the compound that cou...

Salk researchers make fast strides towards understanding how our body controls walking

...al cord that controls the speed with which our leg muscles contract and relax. Their findings mark an importa...cord,and motor neurons, the nerve cells that cause muscles to contract. To explore whether V1 neurons actually contribute to the CPG, Goulding and his collea...

Convergent evolution of molecules in electric fish

...wo sodium channel genes in the electric organs and muscles in electric and non-electric fish. Electric fish use their electric organs, which are modified muscles, to communicate with each other and sense their environment. The researchers found that electric fishes expressed one of the sodium channel gene...

Chocolate milk could be key to longer, healthier life

...ve and easy way to maintain the protein content in muscles or at least replace old and damaged proteins with new ones." With funding assistance from the New Zealand Health Research Council, Dr Miller and PhD student Cheryl Murphy, asked a group of elderly kiwis to perform two identical sessions of aerobic e...

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