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.
Receptor potential is the same as resting membrane potential. For an impulse to take place there must be a state of readiness in the neuron, so the resting membrane potential is an electrical charge brought about by the difference between positive and negative ions outside and inside the cell, if the ions were distributed equally inside and outside there would be no charge and no potential.