Perhaps no cell type uses calcium in as many ways as does a cardiac myocyte. In addition to its well-known involvement in regulating cardiac contractility, recent studies have emphasized the ...

Like entrance and exit doors on a building, a cell's outer surface has doors -- channels, pumps, and transporters that selectively control what molecules enter or exit. In the immune system, T cells ...

The ability to modify the intracellular concentrations of divalent calcium ions is vital to normal cell functioning. In the cells of the cardiac muscle, calcium ions play a crucial role in coupling ...