Ion channel linked to brain inflammation identified

Northwestern Medicine investigators have identified how a calcium channel in the nervous system contributes to brain inflammation, according to a study published in Nature Communications.


Key protein helps infant mice absorb more calcium from breast milk

A key protein known as claudin-2, which lines the intestinal epithelial cells of infant mice, helps them absorb more calcium from breast milk, according to a new study published in the journal Function titled "Maternal epidermal ...


How to get vitamin D without spending too much time in the sun

Vitamin D is vital for numerous bodily functions. While sunlight is the primary source of vitamin D, record high temperatures this summer may dissuade people from spending time in the sun. An expert at Baylor College of Medicine ...


How heart failure leads to cognitive decline

Heart failure may lead to cognitive decline by creating a tiny calcium leak inside the brain's neurons, according to a new study published in Nature Neuroscience by researchers at Columbia University. The finding could open ...

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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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