Action potential may be defined as the change of the membrane potential of the cell with response to the stimulus. The different ions enter and exit the cells.
Action potential generates in the cell when the threshold voltage - gated channel reaches and opens the voltage gate channel. The opening of voltage gated channel changes the membrane potential of the cell.
Convection currents can make tectonic plates in the mantle shake around. If there is an area with a lot of convection currents, the tectonic plates will break apart and form a disputed area. When the tectonic plates try to combine again, a earthquake is at stake.
The enzyme pepsin functions with a very low pH of around 2. It is found in the stomach, with the acidity coming from the hydrochloric acid present there. it breaks proteins into amino acids.
