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.
The opening and closing of ion channels can induce a departure from the resting potential. This is called a depolarization if the interior voltage becomes less negative (say from â70 mV to â60 mV), or a hyperpolarization if the interior voltage becomes more negative (say from â70 mV to â80 mV).