this proposal is supported by the many epithelial properties of brain capillary ecs including the presence of 1 ) continuous tight junctions , 2 ) low transcellular permeability , 3 ) transcellular concentration gradients , 4 ) a transcellular potential difference , 5 ) a high transcellular resistance , and 6 ) an asymmetrical distribution of transport systems between the luminal and antiluminal plasma membranes .
C0006104
brain
C0086045
concentration