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Goldman equation

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2504: 1023: 43: 588: 2269: 657: 1298: 1973: 3072: 232: 2499:{\displaystyle {\begin{aligned}E_{X}&\approx {\frac {0.0267\ \mathrm {V} }{z}}\ln {\frac {X_{o}}{X_{i}}}\\&={\frac {26.7\ \mathrm {mV} }{z}}\ln {\frac {X_{o}}{X_{i}}}\\&\approx {\frac {61.5\ \mathrm {mV} }{z}}\log {\frac {X_{o}}{X_{i}}}&{\text{ since }}\ln 10\approx 2.303\end{aligned}}} 1018:{\displaystyle E_{m,\mathrm {K} _{x}\mathrm {\text{Na}} _{1-x}\mathrm {Cl} }={\frac {RT}{F}}\ln {\left({\frac {P_{\text{Na}}_{\mathrm {out} }+P_{\text{K}}_{\mathrm {out} }+P_{\text{Cl}}_{\mathrm {in} }}{P_{\text{Na}}_{\mathrm {in} }+P_{\text{K}}_{\mathrm {in} }+P_{\text{Cl}}_{\mathrm {out} }}}\right)}} 3283:
Current density has units of (Amperes/m). Molar flux has units of (mol/(s m)). Thus, to get current density from molar flux one needs to multiply by Faraday's constant F (Coulombs/mol). F will then cancel from the equation below. Since the valence has already been accounted for above, the charge
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The ionic charge determines the sign of the membrane potential contribution. During an action potential, although the membrane potential changes about 100mV, the concentrations of ions inside and outside the cell do not change significantly. They are always very close to their respective
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There is such a current associated with every type of ion that can cross the membrane; this is because each type of ion would require a distinct membrane potential to balance diffusion, but there can only be one membrane potential. By assumption, at the Goldman voltage
2904: 2120: 583:{\displaystyle E_{m}={\frac {RT}{F}}\ln {\left({\frac {\sum _{i}^{n}P_{M_{i}^{+}}_{\mathrm {out} }+\sum _{j}^{m}P_{A_{j}^{-}}_{\mathrm {in} }}{\sum _{i}^{n}P_{M_{i}^{+}}_{\mathrm {in} }+\sum _{j}^{m}P_{A_{j}^{-}}_{\mathrm {out} }}}\right)}} 3373:, not considered here which serve to balance each individual ion's current, so that the ion concentrations on either side of the membrane do not change over time in equilibrium.) If all the ions are monovalent—that is, if all the 2046: 3698: 3509: 1293:{\displaystyle E_{m,{\text{Na}}}={\frac {RT}{F}}\ln {\left({\frac {P_{\text{Na}}_{\mathrm {out} }}{P_{\text{Na}}_{\mathrm {in} }}}\right)}={\frac {RT}{F}}\ln {\left({\frac {_{\mathrm {out} }}{_{\mathrm {in} }}}\right)}} 1738: 2621: 2258: 649: 3192: 2175: 1968:{\displaystyle E_{X}=61.5\,\mathrm {mV} \cdot \log {\left({\frac {_{\mathrm {out} }}{_{\mathrm {in} }}}\right)}=-61.5\,\mathrm {mV} \cdot \log {\left({\frac {_{\mathrm {out} }}{_{\mathrm {in} }}}\right)}} 3498: 3278: 2274: 1688: 3128: 3364: 1377: 1428: 3067:{\displaystyle j_{\mathrm {A} }=\mu n_{\mathrm {A} }P_{\mathrm {A} }{\frac {\left_{\mathrm {out} }-\left_{\mathrm {in} }e^{n_{\mathrm {A} }\mu }}{1-e^{n_{\mathrm {A} }\mu }}}} 1484: 1597: 17: 3423: 1599:
is approximately 26.7 mV at human body temperature (37 Â°C); when factoring in the change-of-base formula between the natural logarithm, ln, and logarithm with base 10
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According to Goldman's model, only two factors influence the motion of ions across a permeable membrane: the average electric field and the difference in ionic
1558: 1536: 1506: 224: 200: 1990: 3874:{\displaystyle v=\sum _{\mathrm {cations\ C} }P_{\mathrm {C} }\left_{\mathrm {in} }+\sum _{\mathrm {anions\ A} }P_{\mathrm {A} }\left_{\mathrm {out} }} 3685:{\displaystyle w=\sum _{\mathrm {cations\ C} }P_{\mathrm {C} }\left_{\mathrm {out} }+\sum _{\mathrm {anions\ A} }P_{\mathrm {A} }\left_{\mathrm {in} }} 2797:
due to the electric field, which increases linearly with the electric field; Formally, it is multiplied by the drift velocity of the ions, with the
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from one side of the membrane to the other. The electric field is assumed to be constant across the membrane, so that it can be set equal to
2760:{\displaystyle j_{\mathrm {A} }=-D_{\mathrm {A} }\left({\frac {d\left}{dz}}-{\frac {n_{\mathrm {A} }F}{RT}}{\frac {E_{m}}{L}}\left\right)} 1693: 31: 2183: 596: 3146: 2125: 3434: 107: 4203:
The membrane voltage is calculated interactively as the number of ions are changed between the inside and outside of the cell.
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of each ion in the equation above, therefore, should be interpreted as +1 or -1 depending on the polarity of the ion.
4159: 126: 60: 93: 3369:(Although the current for each ion type considered here is nonzero, there are other pumps in the membrane, e.g. 1602: 3083: 2855: 64: 3307: 75: 2615:—in other words, the number of ions crossing per time and per area of the membrane—is given by the formula 4221: 2534: 4195: 4101: 4052: 4010: 3968: 1347: 2771: 1384: 155:
across a cell's membrane, taking into account all of the ions that are permeant through that membrane.
1443: 1570: 3933: 3928: 3386: 2115:{\displaystyle F\approx {\frac {9.6\times 10^{4}\ \mathrm {J} }{\mathrm {mol} \cdot \mathrm {V} }}} 53: 3967:
Enderle, John (2005-01-01), Enderle, John D.; Blanchard, Susan M.; Bronzino, Joseph D. (eds.),
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direction being perpendicular to the membrane. Assuming that the system is symmetrical in the
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and the fact that one volt is equal to one joule of energy per coulomb of charge, the equation
100: 4151: 4144: 3948: 3923: 1306: 8: 2813: 163: 4206: 4113: 4064: 3980: 2790: 1543: 1521: 1509: 1491: 209: 185: 167: 2041:{\displaystyle R\approx {\frac {8.3\ \mathrm {J} }{\mathrm {K} \cdot \mathrm {mol} }}} 4155: 4117: 4068: 4026: 4022: 3984: 3901: 152: 4183: 4109: 4108:, Woodhead Publishing Series in Biomaterials, Woodhead Publishing, pp. 13–43, 4060: 4018: 3976: 3893: 3198: 1561: 159: 4190: 3943: 3201: 2810: 2806: 2510: 1029: 3913: 2841: 2798: 2571: 4215: 4051:
Enderle, John D. (2012-01-01), Enderle, John D.; Bronzino, Joseph D. (eds.),
4011:"Chapter 2 – Mechanisms of Ion Transport Across Cell Membranes and Epithelia" 3900:; in this case, the formula for the Goldman equation can be solved using the 2779: 2578: 4200: 3918: 2834: 171: 2598:
is the thickness of the membrane. For a given ion denoted A with valence
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Includes a well-explained derivation of the Goldman-Hodgkin-Katz equation
2823: 1431: 4150:(2nd ed.). Sunderland, Massachusetts: Sinauer Associates. pp.  1486:= the intracellular concentration of that ion (in moles per cubic meter) 4009:
Reuss, Luis (2008-01-01), Alpern, Robert J.; Hebert, Steven C. (eds.),
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This results in the following if we consider a membrane separating two
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Potential, Impedance, and Rectification in Membranes by Goldman (1943)
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of the ion A (e.g., +1 for K, +2 for Ca and −1 for Cl), the
1733:{\displaystyle 26.7\,\mathrm {mV} \cdot 2.303=61.5\,\mathrm {mV} } 3885: 2522: 1339: 2253:{\displaystyle E_{X}={\frac {RT}{zF}}\ln {\frac {X_{o}}{X_{i}}}} 1979:
concentrations when the membrane is at their resting potential.
644:{\displaystyle \mathrm {K} _{x}\mathrm {Na} _{1-x}\mathrm {Cl} } 27:
Generalization of the Nernst equation for the membrane potential
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directions (around and along the axon, respectively), only the
1513: 3187:{\displaystyle P_{\mathrm {A} }={\frac {D_{\mathrm {A} }}{L}}} 2782:
gradient, i.e., from high to low concentration. The constant
2170:{\displaystyle T=37\ ^{\circ }\mathrm {C} =310\ \mathrm {K} } 1335: 3493:{\displaystyle {\frac {FE_{m}}{RT}}=\mu =\ln {\frac {w}{v}}} 2794: 2606: 1331: 203: 4102:"2 - Physiological principles of electrical stimulation" 3973:
Introduction to Biomedical Engineering (Second Edition)
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Introduction to Biomedical Engineering (Third Edition)
3273:{\displaystyle J_{A}=q_{\mathrm {A} }j_{\mathrm {A} }} 4100:
Bhadra, Narendra (2015-01-01), Kilgore, Kevin (ed.),
3701: 3512: 3437: 3389: 3310: 3232: 3149: 3086: 2907: 2624: 2272: 2186: 2128: 2054: 1993: 1749: 1696: 1605: 1573: 1546: 1524: 1494: 1446: 1387: 1379:= the selectivity for that ion (in meters per second) 1350: 1309: 1041: 660: 599: 235: 212: 188: 3380:equal either +1 or -1—this equation can be written 67:. Unsourced material may be challenged and removed. 4143: 4106:Implantable Neuroprostheses for Restoring Function 3873: 3684: 3492: 3417: 3358: 3272: 3186: 3122: 3066: 2759: 2498: 2252: 2169: 2114: 2040: 1967: 1732: 1682: 1591: 1552: 1530: 1500: 1478: 1430:= the extracellular concentration of that ion (in 1422: 1371: 1322: 1292: 1017: 643: 582: 218: 194: 4015:Seldin and Giebisch's The Kidney (Fourth Edition) 4213: 2553:direction need be considered; thus, the voltage 177: 4017:, San Diego: Academic Press, pp. 35–56, 1982: 1032:-like" but has a term for each permeant ion: 2793:of the ion A. The second term reflects the 3140:is the ionic permeability, defined here as 2521:Goldman's equation seeks to determine the 1683:{\displaystyle (^{-1}=\ln(10)=2.30258...)} 3123:{\displaystyle \mu ={\frac {FE_{m}}{RT}}} 2847:, which is the total charge of a mole of 2537:is used to describe the system, with the 1870: 1766: 1721: 1700: 127:Learn how and when to remove this message 4196:Goldman-Hodgkin-Katz Equation Calculator 3359:{\displaystyle J_{tot}=\sum _{A}J_{A}=0} 4141: 4050: 3966: 3428:whose solution is the Goldman equation 14: 4214: 4201:Nernst/Goldman interactive Java applet 4099: 1740:, a value often used in neuroscience. 4008: 1434:per cubic meter, to match the other 141:Goldman–Hodgkin–Katz voltage equation 18:Goldman–Hodgkin–Katz voltage equation 4095: 4093: 4091: 4089: 4053:"Chapter 12 – Bioelectric Phenomena" 3301:, the total current density is zero 65:adding citations to reliable sources 36: 2886:with the boundary conditions (0) = 166:, and the Medicine Nobel laureates 24: 4114:10.1016/b978-1-78242-101-6.00002-1 4065:10.1016/b978-0-12-374979-6.00012-5 3981:10.1016/b978-0-12-238662-6.50013-6 3865: 3862: 3859: 3843: 3830: 3818: 3812: 3809: 3806: 3803: 3800: 3797: 3782: 3779: 3763: 3750: 3738: 3732: 3729: 3726: 3723: 3720: 3717: 3714: 3676: 3673: 3657: 3644: 3632: 3626: 3623: 3620: 3617: 3614: 3611: 3596: 3593: 3590: 3574: 3561: 3549: 3543: 3540: 3537: 3534: 3531: 3528: 3525: 3264: 3252: 3217:of the ion multiplied by the flux 3173: 3156: 3077:where ÎĽ is a dimensionless number 3050: 3020: 3003: 3000: 2990: 2975: 2972: 2969: 2959: 2944: 2932: 2914: 2744: 2702: 2671: 2649: 2631: 2430: 2427: 2367: 2364: 2304: 2163: 2149: 2105: 2097: 2094: 2091: 2084: 2031: 2028: 2025: 2017: 2010: 1951: 1948: 1921: 1918: 1915: 1875: 1872: 1847: 1844: 1817: 1814: 1811: 1771: 1768: 1726: 1723: 1705: 1702: 1470: 1467: 1457: 1454: 1451: 1414: 1411: 1408: 1398: 1395: 1392: 1372:{\displaystyle P_{\mathrm {ion} }} 1363: 1360: 1357: 1276: 1273: 1244: 1241: 1238: 1171: 1168: 1129: 1126: 1123: 1001: 998: 995: 955: 952: 912: 909: 870: 867: 827: 824: 821: 781: 778: 775: 706: 703: 674: 637: 634: 617: 614: 602: 566: 563: 560: 490: 487: 418: 415: 345: 342: 339: 32:Goldman–Hodgkin–Katz flux equation 25: 4238: 4184:Nernst/Goldman Equation Simulator 4171: 4086: 1423:{\displaystyle _{\mathrm {out} }} 4023:10.1016/b978-012088488-9.50005-x 1479:{\displaystyle _{\mathrm {in} }} 41: 4178:Subthreshold membrane phenomena 1592:{\displaystyle {\frac {RT}{F}}} 52:needs additional citations for 4135: 4044: 4002: 3960: 3888:are considered, terms such as 2874:; integrating both sides from 2774:, which gives the flux due to 2770:The first term corresponds to 2122:, (assuming body temperature) 1943: 1929: 1910: 1896: 1839: 1825: 1806: 1792: 1677: 1668: 1662: 1641: 1637: 1631: 1609: 1606: 1462: 1447: 1403: 1388: 1268: 1252: 1233: 1217: 1163: 1147: 1118: 1102: 990: 974: 947: 931: 904: 888: 862: 846: 816: 800: 770: 754: 555: 536: 482: 463: 410: 391: 334: 315: 13: 1: 3954: 3418:{\displaystyle w-ve^{\mu }=0} 2809:. The constants here are the 2516: 1330:= the membrane potential (in 182:The GHK voltage equation for 1538:= the temperature in kelvins 178:Equation for monovalent ions 158:The discoverers of this are 7: 4146:Nerve and Muscle Excitation 3907: 2535:Cartesian coordinate system 147:, is used in cell membrane 10: 4243: 1983:Calculating the first term 29: 4227:Electrochemical equations 3884:If divalent ions such as 2898:, one gets the solution 2807:electrophoretic mobility 2803:Stokes–Einstein relation 30:Not to be confused with 3969:"Bioelectric Phenomena" 2772:Fick's law of diffusion 143:, sometimes called the 3875: 3686: 3494: 3419: 3360: 3274: 3188: 3124: 3068: 2854:This is a first-order 2761: 2533:across a membrane. A 2500: 2254: 2171: 2116: 2042: 1969: 1734: 1684: 1593: 1554: 1532: 1502: 1480: 1424: 1373: 1324: 1294: 1019: 645: 584: 513: 440: 368: 292: 220: 196: 3892:appear, which is the 3876: 3687: 3495: 3420: 3361: 3275: 3189: 3125: 3069: 2762: 2574:across the membrane. 2501: 2255: 2172: 2117: 2043: 1970: 1735: 1685: 1594: 1555: 1533: 1503: 1481: 1425: 1374: 1325: 1323:{\displaystyle E_{m}} 1295: 1020: 646: 585: 499: 426: 354: 278: 221: 197: 3949:Saltatory conduction 3934:Hodgkin–Huxley model 3929:Hindmarsh–Rose model 3924:GHK current equation 3699: 3510: 3435: 3387: 3308: 3230: 3147: 3084: 2905: 2801:expressed using the 2622: 2270: 2184: 2126: 2052: 1991: 1747: 1694: 1603: 1571: 1544: 1522: 1492: 1444: 1385: 1348: 1307: 1039: 658: 597: 233: 210: 202:monovalent positive 186: 61:improve this article 1564:(coulombs per mole) 553: 533: 480: 460: 408: 388: 332: 312: 164:Columbia University 4222:Physical chemistry 4189:2010-08-08 at the 3939:Morris–Lecar model 3871: 3823: 3743: 3682: 3637: 3554: 3490: 3415: 3356: 3339: 3270: 3210:equals the charge 3184: 3120: 3064: 2791:diffusion constant 2757: 2496: 2494: 2263:can be reduced to 2250: 2167: 2112: 2038: 1965: 1730: 1680: 1589: 1562:Faraday's constant 1550: 1528: 1510:ideal gas constant 1498: 1476: 1420: 1369: 1320: 1290: 1015: 641: 580: 539: 519: 466: 446: 394: 374: 318: 298: 216: 192: 168:Alan Lloyd Hodgkin 76:"Goldman equation" 4123:978-1-78242-101-6 4074:978-0-12-374979-6 4032:978-0-12-088488-9 3990:978-0-12-238662-6 3902:quadratic formula 3817: 3791: 3737: 3708: 3631: 3605: 3548: 3519: 3488: 3463: 3330: 3182: 3118: 3062: 2737: 2720: 2688: 2570:component of the 2475: 2474: since  2468: 2438: 2425: 2405: 2375: 2362: 2342: 2312: 2302: 2248: 2218: 2161: 2141: 2110: 2082: 2036: 2008: 1958: 1854: 1587: 1553:{\displaystyle F} 1531:{\displaystyle T} 1501:{\displaystyle R} 1283: 1259: 1224: 1201: 1178: 1154: 1144: 1109: 1099: 1076: 1056: 1008: 981: 971: 938: 928: 895: 885: 853: 843: 807: 797: 761: 751: 728: 688: 573: 262: 219:{\displaystyle A} 195:{\displaystyle M} 153:Resting potential 151:to determine the 137: 136: 129: 111: 16:(Redirected from 4234: 4166: 4165: 4149: 4142:Junge D (1981). 4139: 4133: 4132: 4131: 4130: 4097: 4084: 4083: 4082: 4081: 4048: 4042: 4041: 4040: 4039: 4006: 4000: 3999: 3998: 3997: 3964: 3880: 3878: 3877: 3872: 3870: 3869: 3868: 3856: 3852: 3851: 3846: 3835: 3834: 3833: 3822: 3821: 3815: 3787: 3786: 3785: 3776: 3772: 3771: 3766: 3755: 3754: 3753: 3742: 3741: 3735: 3691: 3689: 3688: 3683: 3681: 3680: 3679: 3670: 3666: 3665: 3660: 3649: 3648: 3647: 3636: 3635: 3629: 3601: 3600: 3599: 3587: 3583: 3582: 3577: 3566: 3565: 3564: 3553: 3552: 3546: 3499: 3497: 3496: 3491: 3489: 3481: 3464: 3462: 3454: 3453: 3452: 3439: 3424: 3422: 3421: 3416: 3408: 3407: 3365: 3363: 3362: 3357: 3349: 3348: 3338: 3326: 3325: 3279: 3277: 3276: 3271: 3269: 3268: 3267: 3257: 3256: 3255: 3242: 3241: 3199:electric current 3193: 3191: 3190: 3185: 3183: 3178: 3177: 3176: 3166: 3161: 3160: 3159: 3129: 3127: 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Goldman 145:Goldman equation 132: 125: 121: 118: 112: 110: 69: 45: 37: 21: 4242: 4241: 4237: 4236: 4235: 4233: 4232: 4231: 4212: 4211: 4191:Wayback Machine 4174: 4169: 4162: 4140: 4136: 4128: 4126: 4124: 4098: 4087: 4079: 4077: 4075: 4049: 4045: 4037: 4035: 4033: 4007: 4003: 3995: 3993: 3991: 3965: 3961: 3957: 3944:Nernst equation 3910: 3858: 3857: 3847: 3842: 3841: 3837: 3836: 3829: 3828: 3824: 3796: 3795: 3778: 3777: 3767: 3762: 3761: 3757: 3756: 3749: 3748: 3744: 3713: 3712: 3700: 3697: 3696: 3672: 3671: 3661: 3656: 3655: 3651: 3650: 3643: 3642: 3638: 3610: 3609: 3589: 3588: 3578: 3573: 3572: 3568: 3567: 3560: 3559: 3555: 3524: 3523: 3511: 3508: 3507: 3480: 3455: 3448: 3444: 3440: 3438: 3436: 3433: 3432: 3403: 3399: 3388: 3385: 3384: 3379: 3344: 3340: 3334: 3315: 3311: 3309: 3306: 3305: 3300: 3287: 3263: 3262: 3258: 3251: 3250: 3246: 3237: 3233: 3231: 3228: 3227: 3223: 3216: 3209: 3172: 3171: 3167: 3165: 3155: 3154: 3150: 3148: 3145: 3144: 3139: 3110: 3103: 3099: 3095: 3093: 3085: 3082: 3081: 3049: 3048: 3044: 3043: 3039: 3032: 3019: 3018: 3014: 3013: 3009: 2999: 2998: 2989: 2985: 2984: 2968: 2967: 2958: 2954: 2953: 2952: 2950: 2943: 2942: 2938: 2931: 2930: 2926: 2913: 2912: 2908: 2906: 2903: 2902: 2897: 2889: 2821: 2788: 2743: 2739: 2728: 2724: 2722: 2712: 2701: 2700: 2696: 2695: 2693: 2680: 2670: 2666: 2662: 2660: 2659: 2655: 2648: 2647: 2643: 2630: 2629: 2625: 2623: 2620: 2619: 2614: 2604: 2589: 2561: 2532: 2519: 2511:Nernst equation 2493: 2492: 2472: 2470: 2462: 2458: 2452: 2448: 2446: 2426: 2419: 2417: 2408: 2407: 2399: 2395: 2389: 2385: 2383: 2363: 2356: 2354: 2345: 2344: 2336: 2332: 2326: 2322: 2320: 2303: 2296: 2294: 2287: 2281: 2277: 2273: 2271: 2268: 2267: 2242: 2238: 2232: 2228: 2226: 2210: 2202: 2200: 2191: 2187: 2185: 2182: 2181: 2162: 2148: 2142: 2138: 2127: 2124: 2123: 2104: 2090: 2089: 2083: 2074: 2070: 2063: 2061: 2053: 2050: 2049: 2024: 2016: 2015: 2009: 2002: 2000: 1992: 1989: 1988: 1985: 1947: 1946: 1942: 1936: 1932: 1928: 1914: 1913: 1909: 1903: 1899: 1895: 1893: 1889: 1888: 1871: 1843: 1842: 1838: 1832: 1828: 1824: 1810: 1809: 1805: 1799: 1795: 1791: 1789: 1785: 1784: 1767: 1754: 1750: 1748: 1745: 1744: 1722: 1701: 1695: 1692: 1691: 1644: 1640: 1616: 1612: 1604: 1601: 1600: 1576: 1574: 1572: 1569: 1568: 1545: 1542: 1541: 1523: 1520: 1519: 1493: 1490: 1489: 1466: 1465: 1461: 1450: 1445: 1442: 1441: 1407: 1406: 1402: 1391: 1386: 1383: 1382: 1356: 1355: 1351: 1349: 1346: 1345: 1314: 1310: 1308: 1305: 1304: 1272: 1271: 1267: 1261: 1256: 1255: 1251: 1237: 1236: 1232: 1226: 1221: 1220: 1216: 1214: 1210: 1209: 1190: 1188: 1167: 1166: 1162: 1156: 1151: 1150: 1141: 1137: 1136: 1122: 1121: 1117: 1111: 1106: 1105: 1096: 1092: 1091: 1089: 1085: 1084: 1065: 1063: 1053: 1046: 1042: 1040: 1037: 1036: 994: 993: 989: 983: 978: 977: 968: 964: 951: 950: 946: 940: 935: 934: 925: 921: 908: 907: 903: 897: 892: 891: 882: 878: 877: 866: 865: 861: 855: 850: 849: 840: 836: 820: 819: 815: 809: 804: 803: 794: 790: 774: 773: 769: 763: 758: 757: 748: 744: 743: 741: 737: 736: 717: 715: 702: 690: 685: 684: 678: 673: 672: 665: 661: 659: 656: 655: 633: 621: 613: 612: 606: 601: 600: 598: 595: 594: 559: 558: 554: 548: 543: 528: 523: 518: 514: 508: 503: 486: 485: 481: 475: 470: 455: 450: 445: 441: 435: 430: 425: 414: 413: 409: 403: 398: 383: 378: 373: 369: 363: 358: 338: 337: 333: 327: 322: 307: 302: 297: 293: 287: 282: 277: 275: 271: 270: 251: 249: 240: 236: 234: 231: 230: 211: 208: 207: 187: 184: 183: 180: 133: 122: 116: 113: 70: 68: 58: 46: 35: 28: 23: 22: 15: 12: 11: 5: 4240: 4230: 4229: 4224: 4210: 4209: 4204: 4198: 4193: 4181: 4173: 4172:External links 4170: 4168: 4167: 4160: 4134: 4122: 4085: 4073: 4043: 4031: 4001: 3989: 3958: 3956: 3953: 3952: 3951: 3946: 3941: 3936: 3931: 3926: 3921: 3916: 3914:Bioelectronics 3909: 3906: 3882: 3881: 3867: 3864: 3861: 3855: 3850: 3845: 3840: 3832: 3827: 3820: 3814: 3811: 3808: 3805: 3802: 3799: 3794: 3790: 3784: 3781: 3775: 3770: 3765: 3760: 3752: 3747: 3740: 3734: 3731: 3728: 3725: 3722: 3719: 3716: 3711: 3707: 3704: 3693: 3692: 3678: 3675: 3669: 3664: 3659: 3654: 3646: 3641: 3634: 3628: 3625: 3622: 3619: 3616: 3613: 3608: 3604: 3598: 3595: 3592: 3586: 3581: 3576: 3571: 3563: 3558: 3551: 3545: 3542: 3539: 3536: 3533: 3530: 3527: 3522: 3518: 3515: 3501: 3500: 3487: 3484: 3479: 3476: 3473: 3470: 3467: 3461: 3458: 3451: 3447: 3443: 3426: 3425: 3414: 3411: 3406: 3402: 3398: 3395: 3392: 3377: 3367: 3366: 3355: 3352: 3347: 3343: 3337: 3333: 3329: 3324: 3321: 3318: 3314: 3296: 3285: 3281: 3280: 3266: 3261: 3254: 3249: 3245: 3240: 3236: 3221: 3214: 3207: 3195: 3194: 3181: 3175: 3170: 3164: 3158: 3153: 3137: 3131: 3130: 3116: 3113: 3106: 3102: 3098: 3092: 3089: 3075: 3074: 3058: 3052: 3047: 3042: 3038: 3035: 3028: 3022: 3017: 3012: 3005: 3002: 2996: 2992: 2988: 2983: 2977: 2974: 2971: 2965: 2961: 2957: 2946: 2941: 2934: 2929: 2925: 2922: 2916: 2911: 2895: 2887: 2819: 2799:drift velocity 2786: 2768: 2767: 2755: 2750: 2746: 2742: 2736: 2731: 2727: 2718: 2715: 2710: 2704: 2699: 2692: 2686: 2683: 2677: 2673: 2669: 2665: 2658: 2651: 2646: 2642: 2639: 2633: 2628: 2612: 2602: 2585: 2572:electric field 2557: 2528: 2518: 2515: 2507: 2506: 2491: 2488: 2485: 2482: 2479: 2471: 2465: 2461: 2455: 2451: 2445: 2442: 2437: 2432: 2429: 2422: 2416: 2413: 2411: 2409: 2402: 2398: 2392: 2388: 2382: 2379: 2374: 2369: 2366: 2359: 2353: 2350: 2348: 2346: 2339: 2335: 2329: 2325: 2319: 2316: 2311: 2306: 2299: 2293: 2290: 2288: 2284: 2280: 2276: 2275: 2261: 2260: 2245: 2241: 2235: 2231: 2225: 2222: 2216: 2213: 2208: 2205: 2199: 2194: 2190: 2165: 2158: 2155: 2151: 2145: 2137: 2134: 2131: 2107: 2103: 2099: 2096: 2093: 2086: 2077: 2073: 2069: 2066: 2060: 2057: 2033: 2030: 2027: 2023: 2019: 2012: 2005: 1999: 1996: 1984: 1981: 1976: 1975: 1962: 1953: 1950: 1945: 1939: 1935: 1931: 1923: 1920: 1917: 1912: 1906: 1902: 1898: 1892: 1887: 1884: 1881: 1877: 1874: 1869: 1866: 1863: 1858: 1849: 1846: 1841: 1835: 1831: 1827: 1819: 1816: 1813: 1808: 1802: 1798: 1794: 1788: 1783: 1780: 1777: 1773: 1770: 1765: 1762: 1757: 1753: 1728: 1725: 1720: 1717: 1714: 1711: 1707: 1704: 1699: 1679: 1676: 1673: 1670: 1667: 1664: 1661: 1658: 1655: 1650: 1647: 1643: 1639: 1636: 1633: 1630: 1627: 1624: 1619: 1615: 1611: 1608: 1586: 1582: 1579: 1566: 1565: 1549: 1539: 1527: 1517: 1497: 1487: 1472: 1469: 1464: 1459: 1456: 1453: 1449: 1439: 1416: 1413: 1410: 1405: 1400: 1397: 1394: 1390: 1380: 1365: 1362: 1359: 1354: 1343: 1317: 1313: 1301: 1300: 1287: 1278: 1275: 1270: 1264: 1254: 1246: 1243: 1240: 1235: 1229: 1219: 1213: 1208: 1205: 1200: 1196: 1193: 1187: 1182: 1173: 1170: 1165: 1159: 1149: 1140: 1131: 1128: 1125: 1120: 1114: 1104: 1095: 1088: 1083: 1080: 1075: 1071: 1068: 1062: 1052: 1049: 1045: 1026: 1025: 1012: 1003: 1000: 997: 992: 986: 976: 967: 963: 957: 954: 949: 943: 933: 924: 920: 914: 911: 906: 900: 890: 881: 872: 869: 864: 858: 848: 839: 835: 829: 826: 823: 818: 812: 802: 793: 789: 783: 780: 777: 772: 766: 756: 747: 740: 735: 732: 727: 723: 720: 714: 708: 705: 699: 696: 693: 681: 676: 671: 668: 664: 639: 636: 630: 627: 624: 619: 616: 609: 604: 591: 590: 577: 568: 565: 562: 557: 551: 546: 542: 538: 531: 526: 522: 517: 511: 506: 502: 498: 492: 489: 484: 478: 473: 469: 465: 458: 453: 449: 444: 438: 433: 429: 420: 417: 412: 406: 401: 397: 393: 386: 381: 377: 372: 366: 361: 357: 353: 347: 344: 341: 336: 330: 325: 321: 317: 310: 305: 301: 296: 290: 285: 281: 274: 269: 266: 261: 257: 254: 248: 243: 239: 215: 191: 179: 176: 135: 134: 49: 47: 40: 26: 9: 6: 4: 3: 2: 4239: 4228: 4225: 4223: 4220: 4219: 4217: 4208: 4205: 4202: 4199: 4197: 4194: 4192: 4188: 4185: 4182: 4179: 4176: 4175: 4163: 4161:0-87893-410-3 4157: 4153: 4148: 4147: 4138: 4125: 4119: 4115: 4111: 4107: 4103: 4096: 4094: 4092: 4090: 4076: 4070: 4066: 4062: 4058: 4054: 4047: 4034: 4028: 4024: 4020: 4016: 4012: 4005: 3992: 3986: 3982: 3978: 3974: 3970: 3963: 3959: 3950: 3947: 3945: 3942: 3940: 3937: 3935: 3932: 3930: 3927: 3925: 3922: 3920: 3917: 3915: 3912: 3911: 3905: 3903: 3899: 3895: 3891: 3887: 3853: 3848: 3838: 3825: 3792: 3788: 3773: 3768: 3758: 3745: 3709: 3705: 3702: 3695: 3694: 3667: 3662: 3652: 3639: 3606: 3602: 3584: 3579: 3569: 3556: 3520: 3516: 3513: 3506: 3505: 3504: 3485: 3482: 3477: 3474: 3471: 3468: 3465: 3459: 3456: 3449: 3445: 3441: 3431: 3430: 3429: 3412: 3409: 3404: 3400: 3396: 3393: 3390: 3383: 3382: 3381: 3376: 3372: 3353: 3350: 3345: 3341: 3335: 3331: 3327: 3322: 3319: 3316: 3312: 3304: 3303: 3302: 3299: 3295: 3289: 3259: 3247: 3243: 3238: 3234: 3226: 3225: 3224: 3220: 3213: 3206: 3203: 3200: 3179: 3168: 3162: 3151: 3143: 3142: 3141: 3136: 3114: 3111: 3104: 3100: 3096: 3090: 3087: 3080: 3079: 3078: 3056: 3045: 3040: 3036: 3033: 3026: 3015: 3010: 2994: 2986: 2981: 2963: 2955: 2939: 2927: 2923: 2920: 2909: 2901: 2900: 2899: 2893: 2885: 2881: 2877: 2873: 2869: 2865: 2861: 2857: 2852: 2850: 2846: 2843: 2839: 2836: 2833:), the molar 2832: 2828: 2825: 2818: 2815: 2812: 2808: 2804: 2800: 2796: 2792: 2785: 2781: 2780:concentration 2777: 2773: 2753: 2748: 2740: 2734: 2729: 2725: 2716: 2713: 2708: 2697: 2690: 2684: 2681: 2675: 2667: 2663: 2656: 2644: 2640: 2637: 2626: 2618: 2617: 2616: 2611: 2608: 2601: 2597: 2593: 2588: 2584: 2580: 2579:concentration 2575: 2573: 2569: 2565: 2560: 2556: 2552: 2548: 2544: 2540: 2536: 2531: 2527: 2524: 2514: 2512: 2509:which is the 2489: 2486: 2483: 2480: 2477: 2463: 2459: 2453: 2449: 2443: 2440: 2435: 2420: 2414: 2412: 2400: 2396: 2390: 2386: 2380: 2377: 2372: 2357: 2351: 2349: 2337: 2333: 2327: 2323: 2317: 2314: 2309: 2297: 2291: 2289: 2282: 2278: 2266: 2265: 2264: 2243: 2239: 2233: 2229: 2223: 2220: 2214: 2211: 2206: 2203: 2197: 2192: 2188: 2180: 2179: 2178: 2156: 2153: 2143: 2135: 2132: 2129: 2101: 2075: 2071: 2067: 2064: 2058: 2055: 2021: 2003: 1997: 1994: 1980: 1960: 1937: 1933: 1904: 1900: 1890: 1885: 1882: 1879: 1867: 1864: 1861: 1856: 1833: 1829: 1800: 1796: 1786: 1781: 1778: 1775: 1763: 1760: 1755: 1751: 1743: 1742: 1741: 1718: 1715: 1712: 1709: 1697: 1690:, it becomes 1674: 1671: 1665: 1659: 1656: 1653: 1648: 1645: 1634: 1628: 1625: 1622: 1617: 1613: 1584: 1580: 1577: 1563: 1547: 1540: 1525: 1518: 1515: 1511: 1495: 1488: 1440: 1437: 1433: 1381: 1352: 1344: 1341: 1337: 1333: 1315: 1311: 1303: 1302: 1285: 1262: 1227: 1211: 1206: 1203: 1198: 1194: 1191: 1185: 1180: 1157: 1138: 1112: 1093: 1086: 1081: 1078: 1073: 1069: 1066: 1060: 1050: 1047: 1043: 1035: 1034: 1033: 1031: 1010: 984: 965: 961: 941: 922: 918: 898: 879: 856: 837: 833: 810: 791: 787: 764: 745: 738: 733: 730: 725: 721: 718: 712: 697: 694: 691: 679: 669: 666: 662: 654: 653: 652: 628: 625: 622: 607: 575: 549: 544: 540: 529: 524: 520: 515: 509: 504: 500: 496: 476: 471: 467: 456: 451: 447: 442: 436: 431: 427: 404: 399: 395: 384: 379: 375: 370: 364: 359: 355: 351: 328: 323: 319: 308: 303: 299: 294: 288: 283: 279: 272: 267: 264: 259: 255: 252: 246: 241: 237: 229: 228: 227: 213: 205: 189: 175: 173: 169: 165: 161: 156: 154: 150: 146: 142: 131: 128: 120: 109: 106: 102: 99: 95: 92: 88: 85: 81: 78: â€“  77: 73: 72:Find sources: 66: 62: 56: 55: 50:This article 48: 44: 39: 38: 33: 19: 4145: 4137: 4127:, retrieved 4105: 4078:, retrieved 4056: 4046: 4036:, retrieved 4014: 4004: 3994:, retrieved 3972: 3962: 3919:Cable theory 3897: 3889: 3883: 3502: 3427: 3374: 3368: 3297: 3293: 3290: 3282: 3218: 3211: 3204: 3196: 3134: 3132: 3076: 2891: 2883: 2879: 2875: 2871: 2867: 2863: 2859: 2858:of the form 2853: 2844: 2837: 2835:gas constant 2826: 2816: 2783: 2769: 2609: 2599: 2595: 2591: 2586: 2582: 2576: 2567: 2558: 2554: 2550: 2546: 2542: 2538: 2529: 2525: 2520: 2508: 2262: 1986: 1977: 1567: 1512:(joules per 1027: 651:-solutions: 592: 206:species and 181: 172:Bernard Katz 157: 144: 140: 138: 123: 114: 104: 97: 90: 83: 71: 59:Please help 54:verification 51: 3371:Na/K-ATPase 2860:y' = ay + b 2824:temperature 2805:applied to 4216:Categories 4129:2020-10-23 4080:2020-10-23 4038:2020-10-23 3996:2020-10-23 3955:References 2840:, and the 2517:Derivation 1675:2.30258... 226:negative: 149:physiology 87:newspapers 3849:− 3793:∑ 3710:∑ 3663:− 3607:∑ 3521:∑ 3478:⁡ 3469:μ 3405:μ 3394:− 3332:∑ 3088:μ 3057:μ 3037:− 3027:μ 2982:− 2924:μ 2849:electrons 2778:down the 2776:diffusion 2691:− 2641:− 2487:≈ 2481:⁡ 2444:⁡ 2415:≈ 2381:⁡ 2318:⁡ 2292:≈ 2224:⁡ 2144:∘ 2102:⋅ 2068:× 2059:≈ 2022:⋅ 1998:≈ 1938:− 1905:− 1886:⁡ 1880:⋅ 1865:− 1782:⁡ 1776:⋅ 1710:⋅ 1660:⁡ 1646:− 1629:⁡ 1623:⁡ 1516:per mole) 1207:⁡ 1082:⁡ 985:− 857:− 734:⁡ 695:− 626:− 550:− 530:− 501:∑ 428:∑ 405:− 385:− 356:∑ 280:∑ 268:⁡ 117:June 2010 4187:Archived 3908:See also 2594:, where 2564:integral 3886:calcium 3202:density 2866:= and 2862:, with 2842:faraday 2831:kelvins 2814:valence 2789:is the 2566:of the 2562:is the 2523:voltage 1340:coulomb 1028:It is " 101:scholar 4158:  4120:  4071:  4029:  3987:  3894:square 3816:  3736:  3630:  3547:  3503:where 2878:=0 to 2811:charge 2605:, its 2424:  2361:  2301:  2298:0.0267 2160:  2140:  2081:  2007:  1987:Using 1514:kelvin 1508:= the 1438:units) 1336:joules 1030:Nernst 103:  96:  89:  82:  74:  4152:33–37 2890:and ( 2870:= d/d 2490:2.303 1713:2.303 1432:moles 1332:volts 204:ionic 108:JSTOR 94:books 4156:ISBN 4118:ISBN 4069:ISBN 4027:ISBN 3985:ISBN 3197:The 3133:and 2894:) = 2829:(in 2795:flux 2607:flux 2545:and 2421:61.5 2358:26.7 1868:61.5 1764:61.5 1719:61.5 1698:26.7 1338:per 170:and 139:The 80:news 4110:doi 4061:doi 4019:doi 3977:doi 3896:of 2896:out 2856:ODE 2441:log 2157:310 2065:9.6 2004:8.3 1883:log 1779:log 1626:exp 1614:log 162:of 63:by 4218:: 4154:. 4116:, 4104:, 4088:^ 4067:, 4055:, 4025:, 4013:, 3983:, 3971:, 3904:. 3475:ln 2888:in 2868:y' 2851:. 2513:. 2484:10 2478:ln 2378:ln 2315:ln 2221:ln 2136:37 2072:10 2048:, 1666:10 1657:ln 1618:10 1560:= 1436:SI 1258:Na 1223:Na 1204:ln 1153:Na 1143:Na 1108:Na 1098:Na 1079:ln 1055:Na 980:Cl 970:Cl 894:Na 884:Na 852:Cl 842:Cl 760:Na 750:Na 731:ln 687:Na 265:ln 174:. 4164:. 4112:: 4063:: 4021:: 3979:: 3898:e 3890:e 3866:t 3863:u 3860:o 3854:] 3844:A 3839:[ 3831:A 3826:P 3819:A 3813:s 3810:n 3807:o 3804:i 3801:n 3798:a 3789:+ 3783:n 3780:i 3774:] 3769:+ 3764:C 3759:[ 3751:C 3746:P 3739:C 3733:s 3730:n 3727:o 3724:i 3721:t 3718:a 3715:c 3706:= 3703:v 3677:n 3674:i 3668:] 3658:A 3653:[ 3645:A 3640:P 3633:A 3627:s 3624:n 3621:o 3618:i 3615:n 3612:a 3603:+ 3597:t 3594:u 3591:o 3585:] 3580:+ 3575:C 3570:[ 3562:C 3557:P 3550:C 3544:s 3541:n 3538:o 3535:i 3532:t 3529:a 3526:c 3517:= 3514:w 3486:v 3483:w 3472:= 3466:= 3460:T 3457:R 3450:m 3446:E 3442:F 3413:0 3410:= 3401:e 3397:v 3391:w 3378:A 3375:n 3354:0 3351:= 3346:A 3342:J 3336:A 3328:= 3323:t 3320:o 3317:t 3313:J 3298:m 3294:E 3286:A 3284:q 3265:A 3260:j 3253:A 3248:q 3244:= 3239:A 3235:J 3222:A 3219:j 3215:A 3212:q 3208:A 3205:J 3180:L 3174:A 3169:D 3163:= 3157:A 3152:P 3138:A 3135:P 3115:T 3112:R 3105:m 3101:E 3097:F 3091:= 3051:A 3046:n 3041:e 3034:1 3021:A 3016:n 3011:e 3004:n 3001:i 2995:] 2991:A 2987:[ 2976:t 2973:u 2970:o 2964:] 2960:A 2956:[ 2945:A 2940:P 2933:A 2928:n 2921:= 2915:A 2910:j 2892:L 2884:L 2882:= 2880:z 2876:z 2872:z 2864:y 2845:F 2838:R 2827:T 2820:A 2817:n 2787:A 2784:D 2754:) 2749:] 2745:A 2741:[ 2735:L 2730:m 2726:E 2717:T 2714:R 2709:F 2703:A 2698:n 2685:z 2682:d 2676:] 2672:A 2668:[ 2664:d 2657:( 2650:A 2645:D 2638:= 2632:A 2627:j 2613:A 2610:j 2603:A 2600:n 2596:L 2592:L 2590:/ 2587:m 2583:E 2568:z 2559:m 2555:E 2551:z 2547:y 2543:x 2539:z 2530:m 2526:E 2464:i 2460:X 2454:o 2450:X 2436:z 2431:V 2428:m 2401:i 2397:X 2391:o 2387:X 2373:z 2368:V 2365:m 2352:= 2338:i 2334:X 2328:o 2324:X 2310:z 2305:V 2283:X 2279:E 2244:i 2240:X 2234:o 2230:X 2215:F 2212:z 2207:T 2204:R 2198:= 2193:X 2189:E 2164:K 2154:= 2150:C 2133:= 2130:T 2106:V 2098:l 2095:o 2092:m 2085:J 2076:4 2056:F 2032:l 2029:o 2026:m 2018:K 2011:J 1995:R 1961:) 1952:n 1949:i 1944:] 1934:X 1930:[ 1922:t 1919:u 1916:o 1911:] 1901:X 1897:[ 1891:( 1876:V 1873:m 1862:= 1857:) 1848:n 1845:i 1840:] 1834:+ 1830:X 1826:[ 1818:t 1815:u 1812:o 1807:] 1801:+ 1797:X 1793:[ 1787:( 1772:V 1769:m 1761:= 1756:X 1752:E 1727:V 1724:m 1716:= 1706:V 1703:m 1678:) 1672:= 1669:) 1663:( 1654:= 1649:1 1642:] 1638:) 1635:1 1632:( 1610:[ 1607:( 1585:F 1581:T 1578:R 1548:F 1526:T 1496:R 1471:n 1468:i 1463:] 1458:n 1455:o 1452:i 1448:[ 1415:t 1412:u 1409:o 1404:] 1399:n 1396:o 1393:i 1389:[ 1364:n 1361:o 1358:i 1353:P 1342:) 1316:m 1312:E 1286:) 1277:n 1274:i 1269:] 1263:+ 1253:[ 1245:t 1242:u 1239:o 1234:] 1228:+ 1218:[ 1212:( 1199:F 1195:T 1192:R 1186:= 1181:) 1172:n 1169:i 1164:] 1158:+ 1148:[ 1139:P 1130:t 1127:u 1124:o 1119:] 1113:+ 1103:[ 1094:P 1087:( 1074:F 1070:T 1067:R 1061:= 1051:, 1048:m 1044:E 1011:) 1002:t 999:u 996:o 991:] 975:[ 966:P 962:+ 956:n 953:i 948:] 942:+ 937:K 932:[ 927:K 923:P 919:+ 913:n 910:i 905:] 899:+ 889:[ 880:P 871:n 868:i 863:] 847:[ 838:P 834:+ 828:t 825:u 822:o 817:] 811:+ 806:K 801:[ 796:K 792:P 788:+ 782:t 779:u 776:o 771:] 765:+ 755:[ 746:P 739:( 726:F 722:T 719:R 713:= 707:l 704:C 698:x 692:1 680:x 675:K 670:, 667:m 663:E 638:l 635:C 629:x 623:1 618:a 615:N 608:x 603:K 576:) 567:t 564:u 561:o 556:] 545:j 541:A 537:[ 525:j 521:A 516:P 510:m 505:j 497:+ 491:n 488:i 483:] 477:+ 472:i 468:M 464:[ 457:+ 452:i 448:M 443:P 437:n 432:i 419:n 416:i 411:] 400:j 396:A 392:[ 380:j 376:A 371:P 365:m 360:j 352:+ 346:t 343:u 340:o 335:] 329:+ 324:i 320:M 316:[ 309:+ 304:i 300:M 295:P 289:n 284:i 273:( 260:F 256:T 253:R 247:= 242:m 238:E 214:A 190:M 130:) 124:( 119:) 115:( 105:· 98:· 91:· 84:· 57:. 34:. 20:)

Index

Goldman–Hodgkin–Katz voltage equation
Goldman–Hodgkin–Katz flux equation

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physiology
Resting potential
David E. Goldman
Columbia University
Alan Lloyd Hodgkin
Bernard Katz
ionic
Nernst
volts
joules
coulomb
moles
SI
ideal gas constant
kelvin
Faraday's constant
Nernst equation

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