sodium channel

A sodium channel is a tiny protein found in the cell membranes of neurons and muscle cells. Its main function is to allow sodium ions to rapidly enter the cell when activated, which helps generate electrical signals like nerve impulses and muscle contractions. These channels open and close in response to specific signals, playing a crucial role in communication within the nervous system and controlling movement. Proper functioning of sodium channels is vital for normal bodily functions; disruptions can lead to issues like nerve disorders or muscle diseases.