Rates, transports and currents.

† With Rx− = NADH xcyto /( N− NADH xcyto ) and Rx+ = ( N− NADH xmito ) / NADH xmito . ‡ Further equations in the Hodgkin-Huxley model are: αm = −0.1( ψn +33 ) /( exp [ −0.1 { ψn +33 } ] −1 ) , βm = 4exp[ − { ψn +58 } /12 ] , αh = 0.07exp[ − { ψn +50 } /10 ] , βh = 1/( exp [ −0.1 { ψn +20 } ] +1 ) , αn = −0.01( ψn +34 ) /( exp [ −0.1 { ψn +34 } ] −1 ) , βn = 0.125exp[ − { ψn +44 } /25 ] , m∞ = αm ( αm +βm ) −1 , n∞ = αn ( αn +βn ) −1 , h∞ = αh ( αh +βh ) −1 , τn = 10 −3 ( αn +βn ) −1 , τh = 10 −3 ( αh +βh ) −1 , m Ca = 1/( 1+exp [ − { ψn +20 } /9 ] ) and EL = ( gK pas +g Na n ) −1 [ gK pas EK +g Na n RT F log( Na e+ / Na n+ ) ] . Rates, transports and currents.