2018020/pump.mod at main · ModelDBRepository/2018020 · GitHub

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TITLE Sodium-potassium pump


UNITS {
        (molar) = (1/liter)
        (pA) =  (picoamp)
	(mV) =	(millivolt)
        (uS) =  (micromho)
	(mA) =	(milliamp)
	(mM) =	(millimolar)
}


INDEPENDENT {v FROM -100 TO 50 WITH 50 (mV)}

NEURON {
	SUFFIX pump
	USEION na READ nai WRITE ina
	USEION k WRITE ik
	RANGE  inapump,ipumpmax,n,km

}


PARAMETER {
        dt  (ms)
        nai (mM)
        celsius = 35 (degC)
        ipumpmax  = 0.0092 (mA/cm2)
        km = 10.0 (mM)
        n  = 1.5


}

ASSIGNED {
           ina	   (mA/cm2)
           ik	   (mA/cm2)
           inapump (mA/cm2)
}

BREAKPOINT {
	nai = 0.81
  inapump = ipumpmax*(1/(1 + pow(km/nai,n)))
	ina = 3.0*inapump
	ik = -2.0*inapump
}