Cardiology

Widely used blood pressure drugs might put heart at risk

Drugs based on a molecule called dihydropyridine are commonly prescribed by doctors to treat high blood pressure and angina, a chest pain caused by reduced blood flow to the heart. However, there's a chance that these same ...

Neuroscience

How can ultrasonic brain stimulation cure brain diseases?

Just as rays of sunlight can be focused by a magnifying glass, beams of ultrasound can be focused—not to start a fire, but to converge on a specific target. The pulses of ultrasound are able to pass through obstructions ...

Neuroscience

Lab examines migraine-like phenotypes in nematode

Researchers at UMass Medical School have uncovered a mechanism that causes an imbalance in excitatory and inhibitory signaling in the nervous system. This research, which was carried out using the nematode C. elegans and ...

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Calcium

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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