MEMBRANE POTENTIAL KEY Across 3. Action potentials are considered. 5. the time in which zero action potentials can be generated. 6. MP becomes more positive. 9. MP returns to RMP. 10. these channels are ALWAYS open. 12. this gate closes at the max MP of +30 mV. Down 1. are specific gates opened by depolarization. 2. action potential jumps from node-to-node, "leap frog". 4. MP becomes more negative. 7. ability of the neuron to produce an Action Potential. 8. these channels have molecular gates that open. 11. the VG Na+ Activation gate is what, at -60 mV MP? 12. this movement of Na+ occurs when VG Na+ activation gate is open.