BK Channel (large conductance calcium-activated potassium channels)

BK channels, or large conductance calcium-activated potassium channels, are important proteins found in cell membranes. They help control the flow of potassium ions out of cells, which is crucial for regulating electrical signals in cells, especially in muscles and neurons. When calcium levels rise in a cell, BK channels open, allowing potassium to exit. This movement helps calm the cell's electrical activity and can influence muscle contractions and nerve signaling. Essentially, BK channels play a vital role in maintaining the balance of electrical activity in various tissues throughout the body.