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Membrane semi perméable


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Coucou!

Du coup on l'appelle membrane semi-perméable car elle est perméable à certains éléments mais pas à d'autres.

-elle est perméable aux petits éléments hydrophobes comme l'oxygène, le dioxyde de carbone ou l'azote par exemple

-elle est cependant imperméable aux éléments hydrophiles et aux ions comme les ions K+ nécessitant un transporteur pour pouvoir la traverser.

 

Attention, il existe une exception qui est celle de l'eau qui diffuse relativement bien à travers la membrane.

 

Dis moi si tu as bien compris! 😉

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