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# Driving Force for Movement of Ions

NEURO-FAV6$F The driving force for movement of a given ion across a neuronal membrane is the difference between the membrane potential and the equilibrium potential of that ion is given by:${ V }_{ m } - { E }_{ ion }$. In most mammalian neurons, both the resting membrane potential and the equilibrium potential of chloride ion is around -65mV. This means that A there is no net leakage of chloride ions inward or outward at the resting membrane potential. B there is no${ Cl }^{ - }$channel on the membrane. C if we suddenly increased the number of open${ Cl }^{ - }$channels in the membrane, there will be an outward chloride current and a depolarization of${ V }_{ m }\$.

D

depolarization of the membrane potential decreases the driving force for chloride ions.