Des Moines Memorial Drive. âIn years to come, when the young men of today are the old men of tomorrow those elms will have come into their full strength and beauty, an ever present reminder of the days when the Americans of the World War marched on French highways.â â Lt. Gov. W. J. âWeeâ Coyle, at the dedication ceremonies, 1922.
Stages of Neural Impulses. Resting potential is the name for the electrical state when a neuron is not actively being signaled. A neuron at resting potential has a membrane with established amounts of sodium (Na+) and potassium (K+) ions on either side, leaving the inside of the neuron negatively charged relative to the outside. The action potential is a rapid change in polarity that moves along the nerve fiber from neuron to neuron.
A neuron at rest is negatively charged because the inside of a cell is approximately 70 millivolts more negative than the outside (â70 mV); this number varies by neuron type and by species. This voltage is called the resting membrane potential and is caused by differences in the concentrations of ions inside and outside the cell.