C
C There are a total of 8 entries in the algebraic variable array.
C There are a total of 3 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 t in component environment (second).
C CONSTS(1) is C_m in component environment (fF).
C CONSTS(2) is w_i in component environment (pL).
C CONSTS(3) is w_o in component environment (pL).
C STATES(1) is q_mem in component environment (fC).
C CONSTS(4) is R in component environment (J_per_K_per_mol).
C CONSTS(5) is T in component environment (kelvin).
C CONSTS(6) is F in component environment (C_per_mol).
C ALGBRC(7) is v_NaB in component NaB (fmol_per_sec).
C STATES(2) is q_Na_o in component environment (fmol).
C STATES(3) is q_Na_i in component environment (fmol).
C ALGBRC(1) is V_mem in component environment (J_per_C).
C ALGBRC(8) is I_mem_NaB in component NaB (fA).
C CONSTS(7) is kappa_NaB in component NaB_parameters (fmol_per_sec).
C CONSTS(8) is K_Na_i in component NaB_parameters (per_fmol).
C CONSTS(9) is K_Na_o in component NaB_parameters (per_fmol).
C CONSTS(10) is zNa in component NaB_parameters (dimensionless).
C ALGBRC(2) is mu_Na_i in component NaB (J_per_mol).
C ALGBRC(3) is mu_Na_o in component NaB (J_per_mol).
C ALGBRC(4) is Af_NaB in component NaB (J_per_mol).
C ALGBRC(5) is Ar_NaB in component NaB (J_per_mol).
C ALGBRC(6) is Am_NaB in component NaB (J_per_mol).
C RATES(3) is d/dt q_Na_i in component environment (fmol).
C RATES(2) is d/dt q_Na_o in component environment (fmol).
C RATES(1) is d/dt q_mem in component environment (fC).
C
      SUBROUTINE initConsts(CONSTS, RATES, STATES)
      REAL CONSTS(*), RATES(*), STATES(*)
      CONSTS(1) = 1e6
      CONSTS(2) = 25.8
      CONSTS(3) = 3.52
      STATES(1) = -8.5e4
      CONSTS(4) = 8.31
      CONSTS(5) = 310
      CONSTS(6) = 96500
      STATES(2) = 9.3276
      STATES(3) = 0.00456
      CONSTS(7) = 0.217237
      CONSTS(8) = 0.013549
      CONSTS(9) = 0.0899434
      CONSTS(10) = 1
      RETURN
      END
      SUBROUTINE computeRates(VOI, CONSTS,  RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      ALGBRC(1) = STATES(1)/CONSTS(1)
      ALGBRC(2) =  CONSTS(4)*CONSTS(5)*log( CONSTS(8)*STATES(3))
      ALGBRC(4) = ALGBRC(2)+ (CONSTS(10))*CONSTS(6)*ALGBRC(1)
      ALGBRC(3) =  CONSTS(4)*CONSTS(5)*log( CONSTS(9)*STATES(2))
      ALGBRC(5) = ALGBRC(3)
      ALGBRC(6) =  CONSTS(10)*CONSTS(6)*ALGBRC(1)
      ALGBRC(7) = TERNRY(ALGBRC(6).EQ.0.00000,  CONSTS(7)*(EXP(ALGBRC(4)/( CONSTS(4)*CONSTS(5))) - EXP(ALGBRC(5)/( CONSTS(4)*CONSTS(5)))),  ((( CONSTS(7)*ALGBRC(6))/( CONSTS(4)*CONSTS(5)))/(EXP(ALGBRC(6)/( CONSTS(4)*CONSTS(5))) - 1.00000))*(EXP(ALGBRC(4)/( CONSTS(4)*CONSTS(5))) - EXP(ALGBRC(5)/( CONSTS(4)*CONSTS(5)))))
      RATES(3) = - ALGBRC(7)
      RATES(2) = ALGBRC(7)
      ALGBRC(8) =  - CONSTS(10)*CONSTS(6)*ALGBRC(7)
      RATES(1) = ALGBRC(8)
      RETURN
      END
      SUBROUTINE computeVariables(VOI, CONSTS, RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      ALGBRC(1) = STATES(1)/CONSTS(1)
      ALGBRC(2) =  CONSTS(4)*CONSTS(5)*log( CONSTS(8)*STATES(3))
      ALGBRC(4) = ALGBRC(2)+ (CONSTS(10))*CONSTS(6)*ALGBRC(1)
      ALGBRC(3) =  CONSTS(4)*CONSTS(5)*log( CONSTS(9)*STATES(2))
      ALGBRC(5) = ALGBRC(3)
      ALGBRC(6) =  CONSTS(10)*CONSTS(6)*ALGBRC(1)
      ALGBRC(7) = TERNRY(ALGBRC(6).EQ.0.00000,  CONSTS(7)*(EXP(ALGBRC(4)/( CONSTS(4)*CONSTS(5))) - EXP(ALGBRC(5)/( CONSTS(4)*CONSTS(5)))),  ((( CONSTS(7)*ALGBRC(6))/( CONSTS(4)*CONSTS(5)))/(EXP(ALGBRC(6)/( CONSTS(4)*CONSTS(5))) - 1.00000))*(EXP(ALGBRC(4)/( CONSTS(4)*CONSTS(5))) - EXP(ALGBRC(5)/( CONSTS(4)*CONSTS(5)))))
      ALGBRC(8) =  - CONSTS(10)*CONSTS(6)*ALGBRC(7)
      RETURN
      END
      REAL FUNCTION TERNRY(TEST, VALA, VALB)
      LOGICAL TEST
      REAL VALA, VALB
      IF (TEST) THEN
        TERNRY = VALA
      ELSE
        TERNRY = VALB
      ENDIF
      RETURN
      END