Related topics: muscular dystrophy , skeletal muscle
Muscle
hideMuscle (from Latin musculus, diminutive of mus "mouse") is the contractile tissue of the body and is derived from the mesodermal layer of embryonic germ cells. Muscle cells contain contractile filaments that move past each other and change the size of the cell. They are classified as skeletal, cardiac, or smooth muscles. Their function is to produce force and cause motion. Muscles can cause either locomotion of the organism itself or movement of internal organs. Cardiac and smooth muscle contraction occurs without conscious thought and is necessary for survival. Examples are the contraction of the heart and peristalsis which pushes food through the digestive system. Voluntary contraction of the skeletal muscles is used to move the body and can be finely controlled. Examples are movements of the eye, or gross movements like the quadriceps muscle of the thigh. There are two broad types of voluntary muscle fibers: slow twitch and fast twitch. Slow twitch fibers contract for long periods of time but with little force while fast twitch fibers contract quickly and powerfully but fatigue very rapidly.
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News tagged with muscle
Motorized knee can make you run faster
Dec 22, 2009 |
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(PhysOrg.com) -- Scientists at the Tsukuba University in Japan have come up with a motorized knee you can attach to your leg to make you run faster and use less muscle power.
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Umbilical cord could be new source of plentiful stem cells, researchers say
Dec 17, 2009 |
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Stem cells that could one day provide therapeutic options for muscle and bone disorders can be easily harvested from the tissue of the umbilical cord, just as the blood that goes through it provides precursor cells to treat ...
Five tips for stress-free exams
Dec 16, 2009 |
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(PhysOrg.com) -- It's exam time, and for many students that means long days, late nights and lots of coffee. It's easy to let the anxiety get to you, so what can you do to cope with exam tension?
Scientists discover how the brain encodes memories at a cellular level
10 minutes ago |
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Scientists at UC Santa Barbara have made a major discovery in how the brain encodes memories. The finding, published in the December 24 issue of the journal Neuron, could eventually lead to the development ...
Subtle change dramatically reduces pathogenic potential of Huntington's protein
10 minutes ago |
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Scientists have identified a key molecular switch that may drive the onset of Huntington's disease (HD), an incurable neurodegenerative disorder that leads to severe disruptions in muscle coordination and cognitive function. ...
Scientists take a step towards uncovering the histone code
Dec 20, 2009 |
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Researchers at Emory University School of Medicine have determined the structures of two enzymes that customize histones, the spool-like proteins around which DNA coils inside the cell.
Understanding relationship of proteins, fatty acids could help treat diseases
20 hours ago |
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(PhysOrg.com) -- It's widely understood that eating a diet high in saturated fats increases the risk for a long list of chronic and deadly diseases, including diabetes and coronary heart disease. Understanding ...
Disparity in use of implantable devices to prevent sudden death in heart failure patients
Dec 18, 2009 |
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A study of heart failure patients who meet national guidelines for devices that stabilize and strengthen the heart's electrical system found that only half of eligible patients received the devices. The study, which is the ...
EPA, Army Corps urged to consider separating Great Lakes, river basin
Dec 21, 2009 |
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The once-radical idea of somehow plugging the Chicago Sanitary and Ship Canal to stop the flow of unwanted species from spilling between the Great Lakes and Mississippi River basin is quickly picking up political support.
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