(Medical Xpress)—An enduring neurobiological mystery is why do vertebrate rods and cones shut down their transmitter release in response to a light stimulus. If that particular question is too broad, then consider a slight ...
A Rutgers study has discovered that vitamin D regulates calcium in a section of the intestine that previously was thought not to have played a key role. The findings have important implications on how bowel disease, including ...
Dec 2, 2020
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Research at the University of Leicester is offering new clues into how and why cognitive functions such as memory and learning become impaired with age. A paper published recently in a specialist neuroscience journal shows ...
Aug 12, 2019
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DEAR MAYO CLINIC: I was recently diagnosed with osteoporosis and my health care team suggested that I eat a bone-healthy diet to prevent more issues and maintain strong bones as I age. What is osteoporosis, and how can I ...
May 23, 2022
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Dental enamel is tricky stuff. Even though it's the body's hardest material, if it wears away from cavities, acidic food or drinks or overbrushing, it doesn't regenerate.
Mar 22, 2019
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Researchers at the RIKEN Brain Science Institute in Japan have discovered that the benefits of stimulating the brain with direct current come from its effects on astrocytes—not neurons—in the mouse brain. Published in ...
Mar 22, 2016
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Calcium supplements, frequently given to older people to lessen the risk of brittle bones (osteoporosis) and fractures, are linked to a heightened risk of death among those with aortic valve stenosis, a progressive and potentially ...
Apr 25, 2022
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New research from the University of Queensland has revealed the way human muscles recover after fatigue.
Feb 14, 2017
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When she was a young physician, Dr. Martha Gulati noticed that many of her mentors were prescribing vitamin E and folic acid to patients. Preliminary studies in the early 1990s had linked both supplements to a lower risk ...
Apr 6, 2018
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Aspirin use is associated with a 26% raised risk of heart failure in people with at least one predisposing factor for the condition. That's the finding of a study published today in ESC Heart Failure, a journal of the European ...
Nov 22, 2021
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Calcium (pronounced /ˈkælsiəm/) is the chemical element with the symbol Ca and atomic number 20. It has an atomic mass of 40.078 amu. Calcium is a soft grey alkaline earth metal, and is the fifth most abundant element by mass in the Earth's crust. Calcium is also the fifth most abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.
Calcium is essential for living organisms, particularly in cell physiology, where movement of the calcium ion Ca2+ into and out of the cytoplasm functions as a signal for many cellular processes. As a major material used in mineralization of bones and shells, calcium is the most abundant metal by mass in many animals.
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