â¢ CATALASE (noun). The noun CATALASE has 1 sense: 1. enzyme found in most plant and animal cells that functions as an oxidative catalyst; decomposes hydrogen peroxide into hydrogen and water. Familiarity information: CATALASE used as a noun is very rare.
This POTENTIAL generally measures about 70 millivolts (with the INSIDE of the membrane negative with respect to the outside). So, the RESTING MEMBRANE POTENTIAL is expressed as -70 mV, and the minus means that the inside is negative relative to (or compared to) the outside.
Resting potential: the electrical potential across the plasma membrane of a cell that is not conducting an impulse. Action potential: the reversal and restoration of the electrical potential across the plasma membrane of a cell, as an electrical impulse passes along it (depolarization and repolarization).