some of the factors affecting penetration in living cells may be advantageously studied in models in which the organic salts kg and nag diffuse from an aqueous solution a , through a non-aqueous layer b ( representing the protoplasmic surface ) into an aqueous solution c ( representing the sap and hence called artificial sap ) where they react with co ( 2 ) to form khco ( 3 ) and nahco ( 3 ) .
C0007634
cells
C0175996
protoplasmic