Excitable Tissues

cells and tissues in which excitation is accompanied by action potential, distributed along the cellular membrane. This is a property of the bodies of nerve cells and their processes—nerve fibers, muscle fibers or cells, and some elongated plant cells (the algae Nitella and Chara). The term “excitable tissues” is relative, since excitability (irritability) is a property of all living cells, while action potential is a component of only one form of excitation.