ärsytyspotentiaalin
Ärsytyspotentiaali, often translated as excitation potential or stimulus potential, refers to the change in electrical potential across a cell membrane that is triggered by a stimulus. This stimulus can be chemical, mechanical, or electrical in nature. In excitable cells like neurons and muscle cells, an appropriate stimulus causes a brief, localized, and often reversible change in the membrane potential.
This change involves the opening of ion channels, allowing specific ions to flow across the membrane. The
The significance of ärsytyspotentiaali lies in its role as the initial step in signal transmission in excitable