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Goldman equation

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2493: 1012: 32: 577: 2258: 646: 1287: 1962: 3061: 221: 2488:{\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}}} 1007:{\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)}} 3272:
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
2893: 2109: 572:{\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)}} 3362:, 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 2035: 3687: 3498: 1282:{\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)}} 1727: 2610: 2247: 638: 3181: 2164: 1957:{\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)}} 3487: 3267: 2263: 1677: 3117: 3353: 1366: 1417: 3056:{\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 }}}} 1473: 1586: 3412: 1588:
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
1547: 1525: 1495: 213: 189: 1979: 3863:{\displaystyle v=\sum _{\mathrm {cations\ C} }P_{\mathrm {C} }\left_{\mathrm {in} }+\sum _{\mathrm {anions\ A} }P_{\mathrm {A} }\left_{\mathrm {out} }} 3674:{\displaystyle w=\sum _{\mathrm {cations\ C} }P_{\mathrm {C} }\left_{\mathrm {out} }+\sum _{\mathrm {anions\ A} }P_{\mathrm {A} }\left_{\mathrm {in} }} 2786:
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
2570:
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
2749:{\displaystyle j_{\mathrm {A} }=-D_{\mathrm {A} }\left({\frac {d\left}{dz}}-{\frac {n_{\mathrm {A} }F}{RT}}{\frac {E_{m}}{L}}\left\right)} 1682: 20: 2172: 585: 3135: 2114: 3423: 96: 4192:
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.
4148: 115: 49: 82: 3358:(Although the current for each ion type considered here is nonzero, there are other pumps in the membrane, e.g. 1591: 3072: 2844: 53: 3296: 64: 2604:—in other words, the number of ions crossing per time and per area of the membrane—is given by the formula 4210: 2523: 4184: 4090: 4041: 3999: 3957: 1336: 2760: 1373: 144:
across a cell's membrane, taking into account all of the ions that are permeant through that membrane.
1432: 1559: 3922: 3917: 3375: 2104:{\displaystyle F\approx {\frac {9.6\times 10^{4}\ \mathrm {J} }{\mathrm {mol} \cdot \mathrm {V} }}} 42: 3956:
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
89: 4140: 4133: 3937: 3912: 1295: 8: 2802: 152: 4195: 4102: 4053: 3969: 2779: 1532: 1510: 1498: 1480: 198: 174: 156: 2030:{\displaystyle R\approx {\frac {8.3\ \mathrm {J} }{\mathrm {K} \cdot \mathrm {mol} }}} 4144: 4106: 4057: 4015: 4011: 3973: 3890: 141: 4172: 4098: 4097:, Woodhead Publishing Series in Biomaterials, Woodhead Publishing, pp. 13–43, 4049: 4007: 3965: 3882: 3187: 1550: 148: 4179: 3932: 3190: 2799: 2795: 2499: 1018: 3902: 2830: 2787: 2560: 4204: 4040:
Enderle, John D. (2012-01-01), Enderle, John D.; Bronzino, Joseph D. (eds.),
4000:"Chapter 2 – Mechanisms of Ion Transport Across Cell Membranes and Epithelia" 3889:; in this case, the formula for the Goldman equation can be solved using the 2768: 2567: 4189: 3907: 2823: 160: 2587:
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
2812: 1420: 4139:(2nd ed.). Sunderland, Massachusetts: Sinauer Associates. pp.  1475:= the intracellular concentration of that ion (in moles per cubic meter) 3998:
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
1722:{\displaystyle 26.7\,\mathrm {mV} \cdot 2.303=61.5\,\mathrm {mV} } 3874: 2511: 1328: 2242:{\displaystyle E_{X}={\frac {RT}{zF}}\ln {\frac {X_{o}}{X_{i}}}} 1968:
concentrations when the membrane is at their resting potential.
633:{\displaystyle \mathrm {K} _{x}\mathrm {Na} _{1-x}\mathrm {Cl} } 16:
Generalization of the Nernst equation for the membrane potential
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directions (around and along the axon, respectively), only the
1502: 3176:{\displaystyle P_{\mathrm {A} }={\frac {D_{\mathrm {A} }}{L}}} 2771:
gradient, i.e., from high to low concentration. The constant
2159:{\displaystyle T=37\ ^{\circ }\mathrm {C} =310\ \mathrm {K} } 1324: 3482:{\displaystyle {\frac {FE_{m}}{RT}}=\mu =\ln {\frac {w}{v}}} 2783: 2595: 1320: 192: 4091:"2 - Physiological principles of electrical stimulation" 3962:
Introduction to Biomedical Engineering (Second Edition)
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Introduction to Biomedical Engineering (Third Edition)
3262:{\displaystyle J_{A}=q_{\mathrm {A} }j_{\mathrm {A} }} 4089:
Bhadra, Narendra (2015-01-01), Kilgore, Kevin (ed.),
3690: 3501: 3426: 3378: 3299: 3221: 3138: 3075: 2896: 2613: 2261: 2175: 2117: 2043: 1982: 1738: 1685: 1594: 1562: 1535: 1513: 1483: 1435: 1376: 1368:= the selectivity for that ion (in meters per second) 1339: 1298: 1030: 649: 588: 224: 201: 177: 3369:equal either +1 or -1—this equation can be written 56:. Unsourced material may be challenged and removed. 4132: 4095:Implantable Neuroprostheses for Restoring Function 3862: 3673: 3481: 3406: 3347: 3261: 3175: 3111: 3055: 2748: 2487: 2241: 2158: 2103: 2029: 1956: 1721: 1671: 1580: 1541: 1519: 1489: 1467: 1419:= the extracellular concentration of that ion (in 1411: 1360: 1311: 1281: 1006: 632: 571: 207: 183: 4004:Seldin and Giebisch's The Kidney (Fourth Edition) 4202: 2542:direction need be considered; thus, the voltage 166: 4006:, San Diego: Academic Press, pp. 35–56, 1971: 1021:-like" but has a term for each permeant ion: 2782:of the ion A. The second term reflects the 3129:is the ionic permeability, defined here as 2510:Goldman's equation seeks to determine the 1672:{\displaystyle (^{-1}=\ln(10)=2.30258...)} 3112:{\displaystyle \mu ={\frac {FE_{m}}{RT}}} 2836:, which is the total charge of a mole of 2526:is used to describe the system, with the 1859: 1755: 1710: 1689: 116:Learn how and when to remove this message 4185:Goldman-Hodgkin-Katz Equation Calculator 3348:{\displaystyle J_{tot}=\sum _{A}J_{A}=0} 4130: 4039: 3955: 3417:whose solution is the Goldman equation 4203: 4190:Nernst/Goldman interactive Java applet 4088: 1729:, a value often used in neuroscience. 3997: 1423:per cubic meter, to match the other 130:Goldman–Hodgkin–Katz voltage equation 4084: 4082: 4080: 4078: 4042:"Chapter 12 – Bioelectric Phenomena" 3290:, the total current density is zero 54:adding citations to reliable sources 25: 2875:with the boundary conditions (0) = 155:, and the Medicine Nobel laureates 13: 4103:10.1016/b978-1-78242-101-6.00002-1 4054:10.1016/b978-0-12-374979-6.00012-5 3970:10.1016/b978-0-12-238662-6.50013-6 3854: 3851: 3848: 3832: 3819: 3807: 3801: 3798: 3795: 3792: 3789: 3786: 3771: 3768: 3752: 3739: 3727: 3721: 3718: 3715: 3712: 3709: 3706: 3703: 3665: 3662: 3646: 3633: 3621: 3615: 3612: 3609: 3606: 3603: 3600: 3585: 3582: 3579: 3563: 3550: 3538: 3532: 3529: 3526: 3523: 3520: 3517: 3514: 3253: 3241: 3206:of the ion multiplied by the flux 3162: 3145: 3066:where ÎĽ is a dimensionless number 3039: 3009: 2992: 2989: 2979: 2964: 2961: 2958: 2948: 2933: 2921: 2903: 2733: 2691: 2660: 2638: 2620: 2419: 2416: 2356: 2353: 2293: 2152: 2138: 2094: 2086: 2083: 2080: 2073: 2020: 2017: 2014: 2006: 1999: 1940: 1937: 1910: 1907: 1904: 1864: 1861: 1836: 1833: 1806: 1803: 1800: 1760: 1757: 1715: 1712: 1694: 1691: 1459: 1456: 1446: 1443: 1440: 1403: 1400: 1397: 1387: 1384: 1381: 1361:{\displaystyle P_{\mathrm {ion} }} 1352: 1349: 1346: 1265: 1262: 1233: 1230: 1227: 1160: 1157: 1118: 1115: 1112: 990: 987: 984: 944: 941: 901: 898: 859: 856: 816: 813: 810: 770: 767: 764: 695: 692: 663: 626: 623: 606: 603: 591: 555: 552: 549: 479: 476: 407: 404: 334: 331: 328: 21:Goldman–Hodgkin–Katz flux equation 14: 4227: 4173:Nernst/Goldman Equation Simulator 4160: 4075: 1412:{\displaystyle _{\mathrm {out} }} 4012:10.1016/b978-012088488-9.50005-x 1468:{\displaystyle _{\mathrm {in} }} 30: 4167:Subthreshold membrane phenomena 1581:{\displaystyle {\frac {RT}{F}}} 41:needs additional citations for 4124: 4033: 3991: 3949: 3877:are considered, terms such as 2863:; integrating both sides from 2763:, which gives the flux due to 2759:The first term corresponds to 2111:, (assuming body temperature) 1932: 1918: 1899: 1885: 1828: 1814: 1795: 1781: 1666: 1657: 1651: 1630: 1626: 1620: 1598: 1595: 1451: 1436: 1392: 1377: 1257: 1241: 1222: 1206: 1152: 1136: 1107: 1091: 979: 963: 936: 920: 893: 877: 851: 835: 805: 789: 759: 743: 544: 525: 471: 452: 399: 380: 323: 304: 1: 3943: 3407:{\displaystyle w-ve^{\mu }=0} 2798:. The constants here are the 2505: 1319:= the membrane potential (in 171:The GHK voltage equation for 1527:= the temperature in kelvins 167:Equation for monovalent ions 147:The discoverers of this are 7: 4135:Nerve and Muscle Excitation 3896: 2524:Cartesian coordinate system 136:, is used in cell membrane 10: 4232: 1972:Calculating the first term 18: 4216:Electrochemical equations 3873:If divalent ions such as 2887:, one gets the solution 2796:electrophoretic mobility 2792:Stokes–Einstein relation 19:Not to be confused with 3958:"Bioelectric Phenomena" 2761:Fick's law of diffusion 132:, sometimes called the 3864: 3675: 3483: 3408: 3349: 3263: 3177: 3113: 3057: 2843:This is a first-order 2750: 2522:across a membrane. A 2489: 2243: 2160: 2105: 2031: 1958: 1723: 1673: 1582: 1543: 1521: 1491: 1469: 1413: 1362: 1313: 1283: 1008: 634: 573: 502: 429: 357: 281: 209: 185: 3881:appear, which is the 3865: 3676: 3484: 3409: 3350: 3264: 3178: 3114: 3058: 2751: 2563:across the membrane. 2490: 2244: 2161: 2106: 2032: 1959: 1724: 1674: 1583: 1544: 1522: 1492: 1470: 1414: 1363: 1314: 1312:{\displaystyle E_{m}} 1284: 1009: 635: 574: 488: 415: 343: 267: 210: 186: 3938:Saltatory conduction 3923:Hodgkin–Huxley model 3918:Hindmarsh–Rose model 3913:GHK current equation 3688: 3499: 3424: 3376: 3297: 3219: 3136: 3073: 2894: 2790:expressed using the 2611: 2259: 2173: 2115: 2041: 1980: 1736: 1683: 1592: 1560: 1533: 1511: 1481: 1433: 1374: 1337: 1296: 1028: 647: 586: 222: 199: 191:monovalent positive 175: 50:improve this article 1553:(coulombs per mole) 542: 522: 469: 449: 397: 377: 321: 301: 153:Columbia University 4211:Physical chemistry 4178:2010-08-08 at the 3928:Morris–Lecar model 3860: 3812: 3732: 3671: 3626: 3543: 3479: 3404: 3345: 3328: 3259: 3199:equals the charge 3173: 3109: 3053: 2780:diffusion constant 2746: 2485: 2483: 2252:can be reduced to 2239: 2156: 2101: 2027: 1954: 1719: 1669: 1578: 1551:Faraday's constant 1539: 1517: 1499:ideal gas constant 1487: 1465: 1409: 1358: 1309: 1279: 1004: 630: 569: 528: 508: 455: 435: 383: 363: 307: 287: 205: 181: 157:Alan Lloyd Hodgkin 65:"Goldman equation" 4112:978-1-78242-101-6 4063:978-0-12-374979-6 4021:978-0-12-088488-9 3979:978-0-12-238662-6 3891:quadratic formula 3806: 3780: 3726: 3697: 3620: 3594: 3537: 3508: 3477: 3452: 3319: 3171: 3107: 3051: 2726: 2709: 2677: 2559:component of the 2464: 2463: since  2457: 2427: 2414: 2394: 2364: 2351: 2331: 2301: 2291: 2237: 2207: 2150: 2130: 2099: 2071: 2025: 1997: 1947: 1843: 1576: 1542:{\displaystyle F} 1520:{\displaystyle T} 1490:{\displaystyle R} 1272: 1248: 1213: 1190: 1167: 1143: 1133: 1098: 1088: 1065: 1045: 997: 970: 960: 927: 917: 884: 874: 842: 832: 796: 786: 750: 740: 717: 677: 562: 251: 208:{\displaystyle A} 184:{\displaystyle M} 142:Resting potential 140:to determine the 126: 125: 118: 100: 4223: 4155: 4154: 4138: 4131:Junge D (1981). 4128: 4122: 4121: 4120: 4119: 4086: 4073: 4072: 4071: 4070: 4037: 4031: 4030: 4029: 4028: 3995: 3989: 3988: 3987: 3986: 3953: 3869: 3867: 3866: 3861: 3859: 3858: 3857: 3845: 3841: 3840: 3835: 3824: 3823: 3822: 3811: 3810: 3804: 3776: 3775: 3774: 3765: 3761: 3760: 3755: 3744: 3743: 3742: 3731: 3730: 3724: 3680: 3678: 3677: 3672: 3670: 3669: 3668: 3659: 3655: 3654: 3649: 3638: 3637: 3636: 3625: 3624: 3618: 3590: 3589: 3588: 3576: 3572: 3571: 3566: 3555: 3554: 3553: 3542: 3541: 3535: 3488: 3486: 3485: 3480: 3478: 3470: 3453: 3451: 3443: 3442: 3441: 3428: 3413: 3411: 3410: 3405: 3397: 3396: 3354: 3352: 3351: 3346: 3338: 3337: 3327: 3315: 3314: 3268: 3266: 3265: 3260: 3258: 3257: 3256: 3246: 3245: 3244: 3231: 3230: 3188:electric current 3182: 3180: 3179: 3174: 3172: 3167: 3166: 3165: 3155: 3150: 3149: 3148: 3118: 3116: 3115: 3110: 3108: 3106: 3098: 3097: 3096: 3083: 3062: 3060: 3059: 3054: 3052: 3050: 3049: 3048: 3044: 3043: 3042: 3020: 3019: 3018: 3014: 3013: 3012: 2997: 2996: 2995: 2986: 2982: 2969: 2968: 2967: 2955: 2951: 2940: 2938: 2937: 2936: 2926: 2925: 2924: 2908: 2907: 2906: 2755: 2753: 2752: 2747: 2745: 2741: 2740: 2736: 2727: 2722: 2721: 2712: 2710: 2708: 2700: 2696: 2695: 2694: 2683: 2678: 2676: 2668: 2667: 2663: 2650: 2643: 2642: 2641: 2625: 2624: 2623: 2494: 2492: 2491: 2486: 2484: 2465: 2462: 2458: 2456: 2455: 2446: 2445: 2436: 2428: 2423: 2422: 2412: 2407: 2399: 2395: 2393: 2392: 2383: 2382: 2373: 2365: 2360: 2359: 2349: 2344: 2336: 2332: 2330: 2329: 2320: 2319: 2310: 2302: 2297: 2296: 2289: 2284: 2275: 2274: 2248: 2246: 2245: 2240: 2238: 2236: 2235: 2226: 2225: 2216: 2208: 2206: 2198: 2190: 2185: 2184: 2165: 2163: 2162: 2157: 2155: 2148: 2141: 2136: 2135: 2128: 2110: 2108: 2107: 2102: 2100: 2098: 2097: 2089: 2077: 2076: 2069: 2068: 2067: 2051: 2036: 2034: 2033: 2028: 2026: 2024: 2023: 2009: 2003: 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Goldman 134:Goldman equation 121: 114: 110: 107: 101: 99: 58: 34: 26: 4231: 4230: 4226: 4225: 4224: 4222: 4221: 4220: 4201: 4200: 4180:Wayback Machine 4163: 4158: 4151: 4129: 4125: 4117: 4115: 4113: 4087: 4076: 4068: 4066: 4064: 4038: 4034: 4026: 4024: 4022: 3996: 3992: 3984: 3982: 3980: 3954: 3950: 3946: 3933:Nernst equation 3899: 3847: 3846: 3836: 3831: 3830: 3826: 3825: 3818: 3817: 3813: 3785: 3784: 3767: 3766: 3756: 3751: 3750: 3746: 3745: 3738: 3737: 3733: 3702: 3701: 3689: 3686: 3685: 3661: 3660: 3650: 3645: 3644: 3640: 3639: 3632: 3631: 3627: 3599: 3598: 3578: 3577: 3567: 3562: 3561: 3557: 3556: 3549: 3548: 3544: 3513: 3512: 3500: 3497: 3496: 3469: 3444: 3437: 3433: 3429: 3427: 3425: 3422: 3421: 3392: 3388: 3377: 3374: 3373: 3368: 3333: 3329: 3323: 3304: 3300: 3298: 3295: 3294: 3289: 3276: 3252: 3251: 3247: 3240: 3239: 3235: 3226: 3222: 3220: 3217: 3216: 3212: 3205: 3198: 3161: 3160: 3156: 3154: 3144: 3143: 3139: 3137: 3134: 3133: 3128: 3099: 3092: 3088: 3084: 3082: 3074: 3071: 3070: 3038: 3037: 3033: 3032: 3028: 3021: 3008: 3007: 3003: 3002: 2998: 2988: 2987: 2978: 2974: 2973: 2957: 2956: 2947: 2943: 2942: 2941: 2939: 2932: 2931: 2927: 2920: 2919: 2915: 2902: 2901: 2897: 2895: 2892: 2891: 2886: 2878: 2810: 2777: 2732: 2728: 2717: 2713: 2711: 2701: 2690: 2689: 2685: 2684: 2682: 2669: 2659: 2655: 2651: 2649: 2648: 2644: 2637: 2636: 2632: 2619: 2618: 2614: 2612: 2609: 2608: 2603: 2593: 2578: 2550: 2521: 2508: 2500:Nernst equation 2482: 2481: 2461: 2459: 2451: 2447: 2441: 2437: 2435: 2415: 2408: 2406: 2397: 2396: 2388: 2384: 2378: 2374: 2372: 2352: 2345: 2343: 2334: 2333: 2325: 2321: 2315: 2311: 2309: 2292: 2285: 2283: 2276: 2270: 2266: 2262: 2260: 2257: 2256: 2231: 2227: 2221: 2217: 2215: 2199: 2191: 2189: 2180: 2176: 2174: 2171: 2170: 2151: 2137: 2131: 2127: 2116: 2113: 2112: 2093: 2079: 2078: 2072: 2063: 2059: 2052: 2050: 2042: 2039: 2038: 2013: 2005: 2004: 1998: 1991: 1989: 1981: 1978: 1977: 1974: 1936: 1935: 1931: 1925: 1921: 1917: 1903: 1902: 1898: 1892: 1888: 1884: 1882: 1878: 1877: 1860: 1832: 1831: 1827: 1821: 1817: 1813: 1799: 1798: 1794: 1788: 1784: 1780: 1778: 1774: 1773: 1756: 1743: 1739: 1737: 1734: 1733: 1711: 1690: 1684: 1681: 1680: 1633: 1629: 1605: 1601: 1593: 1590: 1589: 1565: 1563: 1561: 1558: 1557: 1534: 1531: 1530: 1512: 1509: 1508: 1482: 1479: 1478: 1455: 1454: 1450: 1439: 1434: 1431: 1430: 1396: 1395: 1391: 1380: 1375: 1372: 1371: 1345: 1344: 1340: 1338: 1335: 1334: 1303: 1299: 1297: 1294: 1293: 1261: 1260: 1256: 1250: 1245: 1244: 1240: 1226: 1225: 1221: 1215: 1210: 1209: 1205: 1203: 1199: 1198: 1179: 1177: 1156: 1155: 1151: 1145: 1140: 1139: 1130: 1126: 1125: 1111: 1110: 1106: 1100: 1095: 1094: 1085: 1081: 1080: 1078: 1074: 1073: 1054: 1052: 1042: 1035: 1031: 1029: 1026: 1025: 983: 982: 978: 972: 967: 966: 957: 953: 940: 939: 935: 929: 924: 923: 914: 910: 897: 896: 892: 886: 881: 880: 871: 867: 866: 855: 854: 850: 844: 839: 838: 829: 825: 809: 808: 804: 798: 793: 792: 783: 779: 763: 762: 758: 752: 747: 746: 737: 733: 732: 730: 726: 725: 706: 704: 691: 679: 674: 673: 667: 662: 661: 654: 650: 648: 645: 644: 622: 610: 602: 601: 595: 590: 589: 587: 584: 583: 548: 547: 543: 537: 532: 517: 512: 507: 503: 497: 492: 475: 474: 470: 464: 459: 444: 439: 434: 430: 424: 419: 414: 403: 402: 398: 392: 387: 372: 367: 362: 358: 352: 347: 327: 326: 322: 316: 311: 296: 291: 286: 282: 276: 271: 266: 264: 260: 259: 240: 238: 229: 225: 223: 220: 219: 200: 197: 196: 176: 173: 172: 169: 122: 111: 105: 102: 59: 57: 47: 35: 24: 17: 12: 11: 5: 4229: 4219: 4218: 4213: 4199: 4198: 4193: 4187: 4182: 4170: 4162: 4161:External links 4159: 4157: 4156: 4149: 4123: 4111: 4074: 4062: 4032: 4020: 3990: 3978: 3947: 3945: 3942: 3941: 3940: 3935: 3930: 3925: 3920: 3915: 3910: 3905: 3903:Bioelectronics 3898: 3895: 3871: 3870: 3856: 3853: 3850: 3844: 3839: 3834: 3829: 3821: 3816: 3809: 3803: 3800: 3797: 3794: 3791: 3788: 3783: 3779: 3773: 3770: 3764: 3759: 3754: 3749: 3741: 3736: 3729: 3723: 3720: 3717: 3714: 3711: 3708: 3705: 3700: 3696: 3693: 3682: 3681: 3667: 3664: 3658: 3653: 3648: 3643: 3635: 3630: 3623: 3617: 3614: 3611: 3608: 3605: 3602: 3597: 3593: 3587: 3584: 3581: 3575: 3570: 3565: 3560: 3552: 3547: 3540: 3534: 3531: 3528: 3525: 3522: 3519: 3516: 3511: 3507: 3504: 3490: 3489: 3476: 3473: 3468: 3465: 3462: 3459: 3456: 3450: 3447: 3440: 3436: 3432: 3415: 3414: 3403: 3400: 3395: 3391: 3387: 3384: 3381: 3366: 3356: 3355: 3344: 3341: 3336: 3332: 3326: 3322: 3318: 3313: 3310: 3307: 3303: 3285: 3274: 3270: 3269: 3255: 3250: 3243: 3238: 3234: 3229: 3225: 3210: 3203: 3196: 3184: 3183: 3170: 3164: 3159: 3153: 3147: 3142: 3126: 3120: 3119: 3105: 3102: 3095: 3091: 3087: 3081: 3078: 3064: 3063: 3047: 3041: 3036: 3031: 3027: 3024: 3017: 3011: 3006: 3001: 2994: 2991: 2985: 2981: 2977: 2972: 2966: 2963: 2960: 2954: 2950: 2946: 2935: 2930: 2923: 2918: 2914: 2911: 2905: 2900: 2884: 2876: 2808: 2788:drift velocity 2775: 2757: 2756: 2744: 2739: 2735: 2731: 2725: 2720: 2716: 2707: 2704: 2699: 2693: 2688: 2681: 2675: 2672: 2666: 2662: 2658: 2654: 2647: 2640: 2635: 2631: 2628: 2622: 2617: 2601: 2591: 2574: 2561:electric field 2546: 2517: 2507: 2504: 2496: 2495: 2480: 2477: 2474: 2471: 2468: 2460: 2454: 2450: 2444: 2440: 2434: 2431: 2426: 2421: 2418: 2411: 2405: 2402: 2400: 2398: 2391: 2387: 2381: 2377: 2371: 2368: 2363: 2358: 2355: 2348: 2342: 2339: 2337: 2335: 2328: 2324: 2318: 2314: 2308: 2305: 2300: 2295: 2288: 2282: 2279: 2277: 2273: 2269: 2265: 2264: 2250: 2249: 2234: 2230: 2224: 2220: 2214: 2211: 2205: 2202: 2197: 2194: 2188: 2183: 2179: 2154: 2147: 2144: 2140: 2134: 2126: 2123: 2120: 2096: 2092: 2088: 2085: 2082: 2075: 2066: 2062: 2058: 2055: 2049: 2046: 2022: 2019: 2016: 2012: 2008: 2001: 1994: 1988: 1985: 1973: 1970: 1965: 1964: 1951: 1942: 1939: 1934: 1928: 1924: 1920: 1912: 1909: 1906: 1901: 1895: 1891: 1887: 1881: 1876: 1873: 1870: 1866: 1863: 1858: 1855: 1852: 1847: 1838: 1835: 1830: 1824: 1820: 1816: 1808: 1805: 1802: 1797: 1791: 1787: 1783: 1777: 1772: 1769: 1766: 1762: 1759: 1754: 1751: 1746: 1742: 1717: 1714: 1709: 1706: 1703: 1700: 1696: 1693: 1688: 1668: 1665: 1662: 1659: 1656: 1653: 1650: 1647: 1644: 1639: 1636: 1632: 1628: 1625: 1622: 1619: 1616: 1613: 1608: 1604: 1600: 1597: 1575: 1571: 1568: 1555: 1554: 1538: 1528: 1516: 1506: 1486: 1476: 1461: 1458: 1453: 1448: 1445: 1442: 1438: 1428: 1405: 1402: 1399: 1394: 1389: 1386: 1383: 1379: 1369: 1354: 1351: 1348: 1343: 1332: 1306: 1302: 1290: 1289: 1276: 1267: 1264: 1259: 1253: 1243: 1235: 1232: 1229: 1224: 1218: 1208: 1202: 1197: 1194: 1189: 1185: 1182: 1176: 1171: 1162: 1159: 1154: 1148: 1138: 1129: 1120: 1117: 1114: 1109: 1103: 1093: 1084: 1077: 1072: 1069: 1064: 1060: 1057: 1051: 1041: 1038: 1034: 1015: 1014: 1001: 992: 989: 986: 981: 975: 965: 956: 952: 946: 943: 938: 932: 922: 913: 909: 903: 900: 895: 889: 879: 870: 861: 858: 853: 847: 837: 828: 824: 818: 815: 812: 807: 801: 791: 782: 778: 772: 769: 766: 761: 755: 745: 736: 729: 724: 721: 716: 712: 709: 703: 697: 694: 688: 685: 682: 670: 665: 660: 657: 653: 628: 625: 619: 616: 613: 608: 605: 598: 593: 580: 579: 566: 557: 554: 551: 546: 540: 535: 531: 527: 520: 515: 511: 506: 500: 495: 491: 487: 481: 478: 473: 467: 462: 458: 454: 447: 442: 438: 433: 427: 422: 418: 409: 406: 401: 395: 390: 386: 382: 375: 370: 366: 361: 355: 350: 346: 342: 336: 333: 330: 325: 319: 314: 310: 306: 299: 294: 290: 285: 279: 274: 270: 263: 258: 255: 250: 246: 243: 237: 232: 228: 204: 180: 168: 165: 124: 123: 38: 36: 29: 15: 9: 6: 4: 3: 2: 4228: 4217: 4214: 4212: 4209: 4208: 4206: 4197: 4194: 4191: 4188: 4186: 4183: 4181: 4177: 4174: 4171: 4168: 4165: 4164: 4152: 4150:0-87893-410-3 4146: 4142: 4137: 4136: 4127: 4114: 4108: 4104: 4100: 4096: 4092: 4085: 4083: 4081: 4079: 4065: 4059: 4055: 4051: 4047: 4043: 4036: 4023: 4017: 4013: 4009: 4005: 4001: 3994: 3981: 3975: 3971: 3967: 3963: 3959: 3952: 3948: 3939: 3936: 3934: 3931: 3929: 3926: 3924: 3921: 3919: 3916: 3914: 3911: 3909: 3906: 3904: 3901: 3900: 3894: 3892: 3888: 3884: 3880: 3876: 3842: 3837: 3827: 3814: 3781: 3777: 3762: 3757: 3747: 3734: 3698: 3694: 3691: 3684: 3683: 3656: 3651: 3641: 3628: 3595: 3591: 3573: 3568: 3558: 3545: 3509: 3505: 3502: 3495: 3494: 3493: 3474: 3471: 3466: 3463: 3460: 3457: 3454: 3448: 3445: 3438: 3434: 3430: 3420: 3419: 3418: 3401: 3398: 3393: 3389: 3385: 3382: 3379: 3372: 3371: 3370: 3365: 3361: 3342: 3339: 3334: 3330: 3324: 3320: 3316: 3311: 3308: 3305: 3301: 3293: 3292: 3291: 3288: 3284: 3278: 3248: 3236: 3232: 3227: 3223: 3215: 3214: 3213: 3209: 3202: 3195: 3192: 3189: 3168: 3157: 3151: 3140: 3132: 3131: 3130: 3125: 3103: 3100: 3093: 3089: 3085: 3079: 3076: 3069: 3068: 3067: 3045: 3034: 3029: 3025: 3022: 3015: 3004: 2999: 2983: 2975: 2970: 2952: 2944: 2928: 2916: 2912: 2909: 2898: 2890: 2889: 2888: 2882: 2874: 2870: 2866: 2862: 2858: 2854: 2850: 2846: 2841: 2839: 2835: 2832: 2828: 2825: 2822:), the molar 2821: 2817: 2814: 2807: 2804: 2801: 2797: 2793: 2789: 2785: 2781: 2774: 2770: 2769:concentration 2766: 2762: 2742: 2737: 2729: 2723: 2718: 2714: 2705: 2702: 2697: 2686: 2679: 2673: 2670: 2664: 2656: 2652: 2645: 2633: 2629: 2626: 2615: 2607: 2606: 2605: 2600: 2597: 2590: 2586: 2582: 2577: 2573: 2569: 2568:concentration 2564: 2562: 2558: 2554: 2549: 2545: 2541: 2537: 2533: 2529: 2525: 2520: 2516: 2513: 2503: 2501: 2498:which is the 2478: 2475: 2472: 2469: 2466: 2452: 2448: 2442: 2438: 2432: 2429: 2424: 2409: 2403: 2401: 2389: 2385: 2379: 2375: 2369: 2366: 2361: 2346: 2340: 2338: 2326: 2322: 2316: 2312: 2306: 2303: 2298: 2286: 2280: 2278: 2271: 2267: 2255: 2254: 2253: 2232: 2228: 2222: 2218: 2212: 2209: 2203: 2200: 2195: 2192: 2186: 2181: 2177: 2169: 2168: 2167: 2145: 2142: 2132: 2124: 2121: 2118: 2090: 2064: 2060: 2056: 2053: 2047: 2044: 2010: 1992: 1986: 1983: 1969: 1949: 1926: 1922: 1893: 1889: 1879: 1874: 1871: 1868: 1856: 1853: 1850: 1845: 1822: 1818: 1789: 1785: 1775: 1770: 1767: 1764: 1752: 1749: 1744: 1740: 1732: 1731: 1730: 1707: 1704: 1701: 1698: 1686: 1679:, it becomes 1663: 1660: 1654: 1648: 1645: 1642: 1637: 1634: 1623: 1617: 1614: 1611: 1606: 1602: 1573: 1569: 1566: 1552: 1536: 1529: 1514: 1507: 1504: 1500: 1484: 1477: 1429: 1426: 1422: 1370: 1341: 1333: 1330: 1326: 1322: 1304: 1300: 1292: 1291: 1274: 1251: 1216: 1200: 1195: 1192: 1187: 1183: 1180: 1174: 1169: 1146: 1127: 1101: 1082: 1075: 1070: 1067: 1062: 1058: 1055: 1049: 1039: 1036: 1032: 1024: 1023: 1022: 1020: 999: 973: 954: 950: 930: 911: 907: 887: 868: 845: 826: 822: 799: 780: 776: 753: 734: 727: 722: 719: 714: 710: 707: 701: 686: 683: 680: 668: 658: 655: 651: 643: 642: 641: 617: 614: 611: 596: 564: 538: 533: 529: 518: 513: 509: 504: 498: 493: 489: 485: 465: 460: 456: 445: 440: 436: 431: 425: 420: 416: 393: 388: 384: 373: 368: 364: 359: 353: 348: 344: 340: 317: 312: 308: 297: 292: 288: 283: 277: 272: 268: 261: 256: 253: 248: 244: 241: 235: 230: 226: 218: 217: 216: 202: 194: 178: 164: 162: 158: 154: 150: 145: 143: 139: 135: 131: 120: 117: 109: 98: 95: 91: 88: 84: 81: 77: 74: 70: 67: â€“  66: 62: 61:Find sources: 55: 51: 45: 44: 39:This article 37: 33: 28: 27: 22: 4134: 4126: 4116:, retrieved 4094: 4067:, retrieved 4045: 4035: 4025:, retrieved 4003: 3993: 3983:, retrieved 3961: 3951: 3908:Cable theory 3886: 3878: 3872: 3491: 3416: 3363: 3357: 3286: 3282: 3279: 3271: 3207: 3200: 3193: 3185: 3123: 3121: 3065: 2880: 2872: 2868: 2864: 2860: 2856: 2852: 2848: 2847:of the form 2842: 2833: 2826: 2824:gas constant 2815: 2805: 2772: 2758: 2598: 2588: 2584: 2580: 2575: 2571: 2565: 2556: 2547: 2543: 2539: 2535: 2531: 2527: 2518: 2514: 2509: 2497: 2251: 1975: 1966: 1556: 1501:(joules per 1016: 640:-solutions: 581: 195:species and 170: 161:Bernard Katz 146: 133: 129: 127: 112: 103: 93: 86: 79: 72: 60: 48:Please help 43:verification 40: 3360:Na/K-ATPase 2849:y' = ay + b 2813:temperature 2794:applied to 4205:Categories 4118:2020-10-23 4069:2020-10-23 4027:2020-10-23 3985:2020-10-23 3944:References 2829:, and the 2506:Derivation 1664:2.30258... 215:negative: 138:physiology 76:newspapers 3838:− 3782:∑ 3699:∑ 3652:− 3596:∑ 3510:∑ 3467:⁡ 3458:μ 3394:μ 3383:− 3321:∑ 3077:μ 3046:μ 3026:− 3016:μ 2971:− 2913:μ 2838:electrons 2767:down the 2765:diffusion 2680:− 2630:− 2476:≈ 2470:⁡ 2433:⁡ 2404:≈ 2370:⁡ 2307:⁡ 2281:≈ 2213:⁡ 2133:∘ 2091:⋅ 2057:× 2048:≈ 2011:⋅ 1987:≈ 1927:− 1894:− 1875:⁡ 1869:⋅ 1854:− 1771:⁡ 1765:⋅ 1699:⋅ 1649:⁡ 1635:− 1618:⁡ 1612:⁡ 1505:per mole) 1196:⁡ 1071:⁡ 974:− 846:− 723:⁡ 684:− 615:− 539:− 519:− 490:∑ 417:∑ 394:− 374:− 345:∑ 269:∑ 257:⁡ 106:June 2010 4176:Archived 3897:See also 2583:, where 2553:integral 3875:calcium 3191:density 2855:= and 2851:, with 2831:faraday 2820:kelvins 2803:valence 2778:is the 2555:of the 2551:is the 2512:voltage 1329:coulomb 1017:It is " 90:scholar 4147:  4109:  4060:  4018:  3976:  3883:square 3805:  3725:  3619:  3536:  3492:where 2867:=0 to 2800:charge 2594:, its 2413:  2350:  2290:  2287:0.0267 2149:  2129:  2070:  1996:  1976:Using 1503:kelvin 1497:= the 1427:units) 1325:joules 1019:Nernst 92:  85:  78:  71:  63:  4141:33–37 2879:and ( 2859:= d/d 2479:2.303 1702:2.303 1421:moles 1321:volts 193:ionic 97:JSTOR 83:books 4145:ISBN 4107:ISBN 4058:ISBN 4016:ISBN 3974:ISBN 3186:The 3122:and 2883:) = 2818:(in 2784:flux 2596:flux 2534:and 2410:61.5 2347:26.7 1857:61.5 1753:61.5 1708:61.5 1687:26.7 1327:per 159:and 128:The 69:news 4099:doi 4050:doi 4008:doi 3966:doi 3885:of 2885:out 2845:ODE 2430:log 2146:310 2054:9.6 1993:8.3 1872:log 1768:log 1615:exp 1603:log 151:of 52:by 4207:: 4143:. 4105:, 4093:, 4077:^ 4056:, 4044:, 4014:, 4002:, 3972:, 3960:, 3893:. 3464:ln 2877:in 2857:y' 2840:. 2502:. 2473:10 2467:ln 2367:ln 2304:ln 2210:ln 2125:37 2061:10 2037:, 1655:10 1646:ln 1607:10 1549:= 1425:SI 1247:Na 1212:Na 1193:ln 1142:Na 1132:Na 1097:Na 1087:Na 1068:ln 1044:Na 969:Cl 959:Cl 883:Na 873:Na 841:Cl 831:Cl 749:Na 739:Na 720:ln 676:Na 254:ln 163:. 4153:. 4101:: 4052:: 4010:: 3968:: 3887:e 3879:e 3855:t 3852:u 3849:o 3843:] 3833:A 3828:[ 3820:A 3815:P 3808:A 3802:s 3799:n 3796:o 3793:i 3790:n 3787:a 3778:+ 3772:n 3769:i 3763:] 3758:+ 3753:C 3748:[ 3740:C 3735:P 3728:C 3722:s 3719:n 3716:o 3713:i 3710:t 3707:a 3704:c 3695:= 3692:v 3666:n 3663:i 3657:] 3647:A 3642:[ 3634:A 3629:P 3622:A 3616:s 3613:n 3610:o 3607:i 3604:n 3601:a 3592:+ 3586:t 3583:u 3580:o 3574:] 3569:+ 3564:C 3559:[ 3551:C 3546:P 3539:C 3533:s 3530:n 3527:o 3524:i 3521:t 3518:a 3515:c 3506:= 3503:w 3475:v 3472:w 3461:= 3455:= 3449:T 3446:R 3439:m 3435:E 3431:F 3402:0 3399:= 3390:e 3386:v 3380:w 3367:A 3364:n 3343:0 3340:= 3335:A 3331:J 3325:A 3317:= 3312:t 3309:o 3306:t 3302:J 3287:m 3283:E 3275:A 3273:q 3254:A 3249:j 3242:A 3237:q 3233:= 3228:A 3224:J 3211:A 3208:j 3204:A 3201:q 3197:A 3194:J 3169:L 3163:A 3158:D 3152:= 3146:A 3141:P 3127:A 3124:P 3104:T 3101:R 3094:m 3090:E 3086:F 3080:= 3040:A 3035:n 3030:e 3023:1 3010:A 3005:n 3000:e 2993:n 2990:i 2984:] 2980:A 2976:[ 2965:t 2962:u 2959:o 2953:] 2949:A 2945:[ 2934:A 2929:P 2922:A 2917:n 2910:= 2904:A 2899:j 2881:L 2873:L 2871:= 2869:z 2865:z 2861:z 2853:y 2834:F 2827:R 2816:T 2809:A 2806:n 2776:A 2773:D 2743:) 2738:] 2734:A 2730:[ 2724:L 2719:m 2715:E 2706:T 2703:R 2698:F 2692:A 2687:n 2674:z 2671:d 2665:] 2661:A 2657:[ 2653:d 2646:( 2639:A 2634:D 2627:= 2621:A 2616:j 2602:A 2599:j 2592:A 2589:n 2585:L 2581:L 2579:/ 2576:m 2572:E 2557:z 2548:m 2544:E 2540:z 2536:y 2532:x 2528:z 2519:m 2515:E 2453:i 2449:X 2443:o 2439:X 2425:z 2420:V 2417:m 2390:i 2386:X 2380:o 2376:X 2362:z 2357:V 2354:m 2341:= 2327:i 2323:X 2317:o 2313:X 2299:z 2294:V 2272:X 2268:E 2233:i 2229:X 2223:o 2219:X 2204:F 2201:z 2196:T 2193:R 2187:= 2182:X 2178:E 2153:K 2143:= 2139:C 2122:= 2119:T 2095:V 2087:l 2084:o 2081:m 2074:J 2065:4 2045:F 2021:l 2018:o 2015:m 2007:K 2000:J 1984:R 1950:) 1941:n 1938:i 1933:] 1923:X 1919:[ 1911:t 1908:u 1905:o 1900:] 1890:X 1886:[ 1880:( 1865:V 1862:m 1851:= 1846:) 1837:n 1834:i 1829:] 1823:+ 1819:X 1815:[ 1807:t 1804:u 1801:o 1796:] 1790:+ 1786:X 1782:[ 1776:( 1761:V 1758:m 1750:= 1745:X 1741:E 1716:V 1713:m 1705:= 1695:V 1692:m 1667:) 1661:= 1658:) 1652:( 1643:= 1638:1 1631:] 1627:) 1624:1 1621:( 1599:[ 1596:( 1574:F 1570:T 1567:R 1537:F 1515:T 1485:R 1460:n 1457:i 1452:] 1447:n 1444:o 1441:i 1437:[ 1404:t 1401:u 1398:o 1393:] 1388:n 1385:o 1382:i 1378:[ 1353:n 1350:o 1347:i 1342:P 1331:) 1305:m 1301:E 1275:) 1266:n 1263:i 1258:] 1252:+ 1242:[ 1234:t 1231:u 1228:o 1223:] 1217:+ 1207:[ 1201:( 1188:F 1184:T 1181:R 1175:= 1170:) 1161:n 1158:i 1153:] 1147:+ 1137:[ 1128:P 1119:t 1116:u 1113:o 1108:] 1102:+ 1092:[ 1083:P 1076:( 1063:F 1059:T 1056:R 1050:= 1040:, 1037:m 1033:E 1000:) 991:t 988:u 985:o 980:] 964:[ 955:P 951:+ 945:n 942:i 937:] 931:+ 926:K 921:[ 916:K 912:P 908:+ 902:n 899:i 894:] 888:+ 878:[ 869:P 860:n 857:i 852:] 836:[ 827:P 823:+ 817:t 814:u 811:o 806:] 800:+ 795:K 790:[ 785:K 781:P 777:+ 771:t 768:u 765:o 760:] 754:+ 744:[ 735:P 728:( 715:F 711:T 708:R 702:= 696:l 693:C 687:x 681:1 669:x 664:K 659:, 656:m 652:E 627:l 624:C 618:x 612:1 607:a 604:N 597:x 592:K 565:) 556:t 553:u 550:o 545:] 534:j 530:A 526:[ 514:j 510:A 505:P 499:m 494:j 486:+ 480:n 477:i 472:] 466:+ 461:i 457:M 453:[ 446:+ 441:i 437:M 432:P 426:n 421:i 408:n 405:i 400:] 389:j 385:A 381:[ 369:j 365:A 360:P 354:m 349:j 341:+ 335:t 332:u 329:o 324:] 318:+ 313:i 309:M 305:[ 298:+ 293:i 289:M 284:P 278:n 273:i 262:( 249:F 245:T 242:R 236:= 231:m 227:E 203:A 179:M 119:) 113:( 108:) 104:( 94:· 87:· 80:· 73:· 46:. 23:.

Index

Goldman–Hodgkin–Katz flux equation

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Resting potential
David E. Goldman
Columbia University
Alan Lloyd Hodgkin
Bernard Katz
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Nernst
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