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due to __, the cell maintains a greater concentration of sodium ions outside and a greater concentration of potassium ions inside the membrane

the inside of the membrane has ___ while the outside has ___

separation of charge, or potential difference, is called the

stimulation of a membrane can locally affect its __

when the membrane potential becomes less negative, the membrane is

if sufficiently strong depolarization occurs, a __ is achieved as ion channels open

membrane permeability to sodium suddenly changes in the region of stimulation

as ___, sodium ions rush in, and the membrane potential changes and becomes depolarized

potassium channels open to allow potassium ions to leave the cell, the membrane becomes _ and resting potential is reestablished

this rapid sequence of events is the

works to maintain the original concentrations of sodium and potassium ions

is conducted as an action potential is reached at the trigger zone. this spreads by a local current flowing down the fiber, and adjacent areas of the membrane reach action potential

conduct impulses over their entire membrane surface

myelinated fibers conduct impulses from one node of ranvier to the next, a phenomenon called __

is many times faster than conduction on unmyelinated neurons