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.
At the axon hillock of a typical neuron, the resting potential is around â70 millivolts (mV) and the threshold potential is around â55 mV. Synaptic inputs to a neuron cause the membrane to depolarize or hyperpolarize; that is, they cause the membrane potential to rise or fall.