Potencial de Difusion y Potencial de Lesion

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potenciales electricos de membrana...

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INTITUTO POLITECNICO NACIONAL ESCUELA NACIONAL DE CIENCIAS BIOLOGICAS

POTENCIAL DEDE DIFUSION POTENCIAL LESION Y CALDERÓN ZARCO J. LETICIA PÉREZ RODRÍGUEZ E. ANTONIO



INTRODUCCION

Potencial de membrana •

Diferencia e !"#encia$ a a%&"' $a"' e (na %e%&rana )(e 'e!ara * '"$(ci"ne' e iferen#e c"ncen#raci+n e i"ne'.





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P"#encia$ e Nern'#5ei#ar6 E$ !"#encia$ e re!"'" e (na c1$($a e' !r"(ci" !"r iferencia' en $a c"ncen#raci+n e i"ne' en#r" / f(era e $a c1$($a / !"r iferencia' en $a !er%ea&i$ia e $a %e%&rana ce$($ar a $"' iferen#e' i"ne'. E$ !"#encia$ e e)(i$i&ri" e Nern'#2 re$aci"na $a iferencia e !"#encia$ a a%&"' $a"' e (na %e%&rana &i"$+ica en e$ e)(i$i&ri" c"n $a' carac#er7'#ica' re$aci"naa' c"n $"' i"ne' e$ %ei" e8#ern" e in#ern" / e $a !r"!ia %e%&rana. Generaci+n e (n !"#encia$ e %e%&rana. Para (na e8!$icaci+n e#a$$aa2 ,1a'e e$ #e8#". E$ !"#encia$ e Nern'# 'e e'#a&$ece en#re i'"$(ci"ne' 'e!araa' (naac("'" %e%&rana 'e%i!er%ea&$e. P"r e9e%!$"2 :C$ 3c$"r(r" e !"#a'i"42 (na 'a$2 en !"r %ei" 'e i'"cia en :;/ C$< en re$aci+n =>=2 c"%!en'an" $a' cara' !"'i#i,a' e $"' ca#i"ne' !"#a'i" c"n $a' nea#i,a' e $"' ani"ne' c$"r(r"2 !"r $" )(e $a i'"$(ci+n 'er? e$1c#rica%en#e ne(#ra. De e8i'#ir (na %e%&rana &i"$+ica 'e$ec#i,a%en#e !er%ea&$e a$ :; en e$ in#eri"r e $a '"$(ci+n2 $"' :; if(nir?n $i&re%en#e a (n $a" / a "#r" e $a %e%&rana. Sin e%&ar"2 c"%" 0a/ %?' i"ne' en e$ c"%!ar#i%en#" =2 inicia$%en#e @(ir?n %?' i"ne' :; e$ = a$ * )(e e$ * a$ =. C"%" e$ C$< n" !(ee if(nir a #ra,1' e $a %e%&rana2 !r"n#" 0a/ (n e8ce'" e cara !"'i#i,a en e$ c"%!ar#i%en#" * / (n e8ce'" e cara nea#i,a en e$ =. E$ @(i" en caa c"%!ar#i%en#" !er%anece c"n (na cara ne(#ra2 'i &ien $a' cara' en e8ce'" 'e c"ncen#ran a $" $ar" e $a %e%&rana. La' ca!a' e cara !"'i#i,a / nea#i,a a caa $a" e $a %e%&rana !r"(cen (na iferencia e !"#encia$ i'!$a/'#/$e =
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