potassium channel

A potassium channel is a protein structure embedded in cell membranes that allows potassium ions to pass in and out of the cell. It helps regulate the cell's electrical activity by maintaining the proper balance of ions, which is essential for functions like nerve signaling, muscle contractions, and maintaining heartbeat. These channels open and close in response to specific signals, ensuring the cell's environment remains stable and responsive to changes. In essence, potassium channels are vital for controlling electrical signals in the body, helping cells communicate and function properly.