C
C There are a total of 5 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 20 entries in the constant variable array.
C
C
C VOI is time in component environment (second).
C STATES(1) is C_ext_Na in component Concentrations (mM).
C CONSTS(1) is C_ext_H in component Concentrations (mM).
C CONSTS(2) is C_ext_NH4 in component Concentrations (mM).
C CONSTS(3) is C_int_Na in component Concentrations (mM).
C CONSTS(4) is C_int_H in component Concentrations (mM).
C CONSTS(5) is C_int_NH4 in component Concentrations (mM).
C CONSTS(6) is XTxP0_NHE3_Na in component NHE3_Parameters (nmol_per_s_per_cm2).
C CONSTS(7) is XTxP0_NHE3_H in component NHE3_Parameters (nmol_per_s_per_cm2).
C CONSTS(8) is XTxP0_NHE3_NH4 in component NHE3_Parameters (nmol_per_s_per_cm2).
C CONSTS(9) is K_NHE3_Na in component NHE3_Parameters (mM).
C CONSTS(10) is K_NHE3_H in component NHE3_Parameters (mM).
C CONSTS(11) is K_NHE3_NH4 in component NHE3_Parameters (mM).
C CONSTS(17) is XTxP_NHE3_Na in component NHE3 (nmol_per_s_per_cm2).
C CONSTS(18) is XTxP_NHE3_H in component NHE3 (nmol_per_s_per_cm2).
C CONSTS(19) is XTxP_NHE3_NH4 in component NHE3 (nmol_per_s_per_cm2).
C ALGBRC(1) is alpha_ext_Na in component NHE3 (dimensionless).
C CONSTS(12) is beta_ext_H in component NHE3 (dimensionless).
C CONSTS(13) is gamma_ext_NH4 in component NHE3 (dimensionless).
C CONSTS(14) is alpha_int_Na in component NHE3 (dimensionless).
C CONSTS(15) is beta_int_H in component NHE3 (dimensionless).
C CONSTS(16) is gamma_int_NH4 in component NHE3 (dimensionless).
C ALGBRC(2) is sum_NHE3 in component NHE3 (nmol_per_s_per_cm2).
C ALGBRC(3) is J_NHE3_Na in component NHE3 (nmol_per_s_per_cm2).
C ALGBRC(4) is J_NHE3_H in component NHE3 (nmol_per_s_per_cm2).
C ALGBRC(5) is J_NHE3_NH4 in component NHE3 (nmol_per_s_per_cm2).
C RATES(1) is d/dt C_ext_Na in component Concentrations (mM).
C
      SUBROUTINE initConsts(CONSTS, RATES, STATES)
      REAL CONSTS(*), RATES(*), STATES(*)
      STATES(1) = 140
      CONSTS(1) = 4.95e-2
      CONSTS(2) = 0.2
      CONSTS(3) = 19.6
      CONSTS(4) = 1e-3
      CONSTS(5) = 0.23
      CONSTS(6) = 1.6e-3
      CONSTS(7) = 0.48e-3
      CONSTS(8) = 1.6e-3
      CONSTS(9) = 0.03e3
      CONSTS(10) = 72e-6
      CONSTS(11) = 0.027e3
      CONSTS(12) = CONSTS(1)/CONSTS(10)
      CONSTS(19) = 10.0000
      CONSTS(13) = CONSTS(2)/CONSTS(11)
      CONSTS(14) = CONSTS(3)/CONSTS(9)
      CONSTS(15) = CONSTS(4)/CONSTS(10)
      CONSTS(16) = CONSTS(5)/CONSTS(11)
      CONSTS(17) = ( CONSTS(6)*2.00000*CONSTS(4))/(CONSTS(4)+1.00000e-06)
      CONSTS(18) = ( CONSTS(7)*2.00000*CONSTS(4))/(CONSTS(4)+1.00000e-06)
      CONSTS(19) = ( CONSTS(8)*2.00000*CONSTS(4))/(CONSTS(4)+1.00000e-06)
      RETURN
      END
      SUBROUTINE computeRates(VOI, CONSTS,  RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      RATES(1) = CONSTS(19)
      RETURN
      END
      SUBROUTINE computeVariables(VOI, CONSTS, RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      ALGBRC(1) = STATES(1)/CONSTS(9)
      ALGBRC(2) =  (1.00000+ALGBRC(1)+CONSTS(12)+CONSTS(13))*( CONSTS(17)*CONSTS(14)+ CONSTS(18)*CONSTS(15)+ CONSTS(19)*CONSTS(16))+ (1.00000+CONSTS(14)+CONSTS(15)+CONSTS(16))*( CONSTS(17)*ALGBRC(1)+ CONSTS(18)*CONSTS(12)+ CONSTS(19)*CONSTS(13))
      ALGBRC(3) =  (( CONSTS(17)*CONSTS(18))/ALGBRC(2))*( ALGBRC(1)*CONSTS(15) -  CONSTS(14)*CONSTS(12))+ (( CONSTS(17)*CONSTS(19))/ALGBRC(2))*( ALGBRC(1)*CONSTS(16) -  CONSTS(14)*CONSTS(13))
      ALGBRC(4) =  (( CONSTS(17)*CONSTS(18))/ALGBRC(2))*( CONSTS(14)*CONSTS(12) -  ALGBRC(1)*CONSTS(15))+ (( CONSTS(18)*CONSTS(19))/ALGBRC(2))*( CONSTS(12)*CONSTS(16) -  CONSTS(15)*CONSTS(13))
      ALGBRC(5) =  (( CONSTS(17)*CONSTS(19))/ALGBRC(2))*( CONSTS(14)*CONSTS(13) -  ALGBRC(1)*CONSTS(16))+ (( CONSTS(18)*CONSTS(19))/ALGBRC(2))*( CONSTS(13)*CONSTS(15) -  CONSTS(12)*CONSTS(16))
      RETURN
      END