Transporte de membranas Flashcards

1
Q

Na extracelular

A

142 mEq/l

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2
Q

K intracelular

A

140 mEq/l

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3
Q

Na intra

A

10mEq/l

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4
Q

K extra

A

4 meq/l

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5
Q

Ca extra

A

2.4 meq/l

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6
Q

Mg intra

A

58 meq/l

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7
Q

Cl extra

A

103meq/l

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8
Q

transporte activo

A

movimiento de iones o sust a traves de la membrana con una proteina transportadora

de menos a mas

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9
Q

difusion simple

A

movimiento cinético x una abertura de membrana o x espacios intermoleculares

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10
Q

difusion facilitada

A

ocupa una proteina transportadora

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11
Q

rutas de difusion simple

A
  1. x intersticios de la bicapa x sus liposolubles
  2. canales acuosos
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12
Q

difusion x sust liposolubles

A

O2
N2
anhidrido carbonico
alcoholes

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13
Q

difusion x canales proteicos

A

acuaporinas-paso de agua x la membrana

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14
Q

caracteristicas de los canales proteicos

A
  1. permeables de manera selectiva
  2. pueden abrir o cerrar compuertas (x voltaje o por ligandos)
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15
Q

activacion x ligando

A

union de un ligando generando un cambio conformacional

receptor de acetilcolina

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16
Q

V en difusion simple

A

aumenta de manera proporcional

17
Q

V en difusion facilitada

A

no puede aumentar encima de la Vmax

18
Q

osmosis

A

movimiento neto del agua x la diferencia de la concentración

19
Q

presion osmotica esta determinada por

A

numero de particulas x unidad de volumen del liquido

20
Q

La osmolalidad normal del LEC y del LIC es aprox de

A

300 mosmol x kg de agua

21
Q

1 mosmol x litro es equivalente a

A

presion de 19.3 mmHg

22
Q

osmolaridad

A

[] osmolar expresada en osmoles por litro de solución