C
C There are a total of 3 entries in the algebraic variable array.
C There are a total of 1 entries in each of the rate and state variable arrays.
C There are a total of 10 entries in the constant variable array.
C
C
C VOI is time in component environment (second).
C CONSTS(1) is V_m in component concentrations (volt).
C STATES(1) is Na_int in component concentrations (mM).
C CONSTS(2) is Na_ext in component concentrations (mM).
C CONSTS(3) is HCO3_int in component concentrations (mM).
C CONSTS(4) is HCO3_ext in component concentrations (mM).
C ALGBRC(2) is J_NBC_Na in component NBC (mM_per_s).
C ALGBRC(3) is J_NBC_HCO3 in component NBC (mM_per_s).
C CONSTS(5) is g_NBC in component NBC (mS_per_cm2).
C CONSTS(6) is F in component NBC (coulomb_per_mmole).
C CONSTS(7) is R in component NBC (joule_per_mmole_kelvin).
C CONSTS(8) is T in component NBC (kelvin).
C CONSTS(9) is n in component NBC (dimensionless).
C ALGBRC(1) is E_NBC in component NBC (volt).
C RATES(1) is d/dt Na_int in component concentrations (mM).
C
      SUBROUTINE initConsts(CONSTS, RATES, STATES)
      REAL CONSTS(*), RATES(*), STATES(*)
      CONSTS(1) = -0.032
      STATES(1) = 15.0
      CONSTS(2) = 146.0
      CONSTS(3) = 9.0
      CONSTS(4) = 15.0
      CONSTS(5) = 0.08
      CONSTS(6) = 96.5
      CONSTS(7) = 0.008315
      CONSTS(8) = 300
      CONSTS(9) = 2
      CONSTS(9) = 1.00000
      RETURN
      END
      SUBROUTINE computeRates(VOI, CONSTS,  RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      RATES(1) = CONSTS(9)
      RETURN
      END
      SUBROUTINE computeVariables(VOI, CONSTS, RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      ALGBRC(1) =  (( CONSTS(7)*CONSTS(8))/( (1.00000 - CONSTS(9))*CONSTS(6)))*log( (CONSTS(2)/STATES(1))*CONSTS(4)/CONSTS(3) ** 2.00000)
      ALGBRC(2) = ( CONSTS(5)*(ALGBRC(1) - CONSTS(1)))/CONSTS(6)
      ALGBRC(3) =  3.00000*ALGBRC(2)
      RETURN
      END